The U.S. plans to build a $750 million factory in southern Texas to breed billions of sterile flies, ramping up its efforts to keep flesh-eating maggots in Mexico from crossing the border and damaging the American cattle industry.
Secretary Brooke Rollins announced Friday that the U.S. Department of Agriculture hopes to be producing and releasing sterile male New World screwworm flies into the wild within a year from the new factory on Moore Air Base outside Edinburg, Texas, about 20 miles (32 kilometers) from the border. She also said the USDA plans to deploy $100 million in technology, such as fly traps and lures, and step up border patrols by “tick riders” mounted on horseback and train dogs to sniff out the parasite.
In addition, Rollins said the U.S. border will remain closed to cattle, horse and bison imports from Mexico until the U.S. sees that the pest is being pushed back south toward Panama, where the fly had been contained through late last year through the breeding of sterile flies there. The U.S. has closed its border to those imports three times in the past eight months, the last in July, following a report of an infestation about 370 miles (595 kilometers) from the Texas border.
American officials worry that if the fly reaches Texas, its flesh-eating maggots could cause billions of dollars in economic losses and cause already record retail beef prices to rise even more, fueling greater inflation. The parasite also can infest wildlife, household pets and, occasionally, humans.
“Farm security is national security,” Rollins said during a news conference at the Texas State Capitol in Austin with Texas Gov. Greg Abbott. “All Americans should be concerned. But it’s certainly Texas and our border and livestock producing states that are on the front lines of this every day.”
The pest was a problem for the American cattle industry for decades until the U.S. largely eradicated it in the 1970s by breeding and releasing sterile male flies to breed with wild females. It shut down fly factories on U.S. soil afterward.
The Mexican cattle industry has been hit hard by infestations and the U.S. closing its border to imports.
Mexico’s Agriculture ministry said in a statement Friday that Mexico Agriculture and Rural Development Secretary Julio Berdegué Sacristán and Rollins signed a screwworm control action plan. It includes monitoring with fly-attracting traps and establishing that livestock can only be moved within Mexico through government-certified corrals, the statement said.
And on the X social media platform, Berdegué said, “We will continue with conversations that lead to actions that will permit the reopening of livestock exports."
The new fly-breeding factory in Texas would be the first on U.S. soil in decades and represents a ramping up of the USDA's spending on breeding and releasing sterile New World screwworm flies. The sterile males are released in large enough numbers that wild females can't help but mate with them, producing sterile eggs that don't hatch. Eventually, the wild fly population shrinks away because females mate only once in their weekslong lives.
In June, Rollins announced a plan to convert an existing factory for breeding fruit flies into one for breeding sterile New World Screwworm flies, as well as a plan to build a site, also on the air base near Edinburg, for gathering flies imported from Panama and releasing them from small aircraft. Those projects are expected to cost a total of $29.5 million.
The Panama fly factory can breed up to 117 million flies a week, and the new Mexican fly factory is expected to produce up to 100 million more a week. Rollins said the new Texas factory would produce up to 300 million a week. She said President Donald Trump's administration wants to end the U.S. reliance on fly breeding in Mexico and Panama.
“It’s a tactical move that ensures we are prepared and not just reactive, which is today what we have really been working through,” Rollins said.
Hanna reported from Topeka, Kansas. Associated Press writer Fabiola Sánchez in Mexico City contributed reporting.
Technicians prepare bait to attract flies near a cattle auction in Hermosillo, Sonora state, Mexico, Tuesday, July 29, 2025. (AP Photo/Fernando Llano)
Flies of various species sit stuck in a trap near the pens of an auction in Hermosillo, Sonora state, Mexico, Tuesday, July 29, 2025. (AP Photo/Fernando Llano)
Cowboys push a cow out of its spot to a veterinarian inspection at a ranch that exports livestock to the U.S., in Zamora, northern Mexico, Monday, July 28, 2025. (AP Photo/Fernando Llano)
TEHRAN, Iran (AP) — Israel struck a key petrochemical plant at Iran’s massive South Pars natural gas field and killed two paramilitary Revolutionary Guard commanders on Monday, potentially challenging a new 45-day ceasefire proposal for Tehran and the United States as President Donald Trump's ultimatum looms within hours.
The gas field attack was aimed at eliminating a major source of revenue for Iran, Israel said. The field is critical to Iran’s electricity production, but the strike appeared to be separate from Trump’s threats to target power plants and bridges if Tehran doesn't reopen the Strait of Hormuz to all shipping traffic.
Iran’s grip on the strait has caused oil prices to surge and shaken the world economy.
Israel's Defense Minister Israel Katz described “a powerful strike on the largest petrochemical facility in Iran." The gas field shared with Qatar is the world’s largest and sits under the Persian Gulf. Iran’s semiofficial Fars news agency and the judicary’s Mizan news agency reported the attack and blamed the U.S. and Israel.
The White House did not immediately comment, though Trump was set to speak to journalists at the White House Monday afternoon. After Israel’s attack on the field in March, Trump said Israel would not attack it again but warned that if Iran continued striking Qatar’s energy infrastructure, the United States would “massively blow up" the field.
Trump’s deadline for Tehran to reopen the Strait of Hormuz is set for Monday night Washington time.
Egyptian, Pakistani and Turkish mediators have sent Iranian Foreign Minister Abbas Araghchi and U.S. Mideast envoy Steve Witkoff a proposal calling for a 45-day ceasefire and the reopening of the strait, two Mideast officials told The Associated Press. The officials spoke on condition of anonymity to discuss the private negotiations.
Iran’s foreign ministry spokesman Esmail Baghaei told journalists in Tehran that messages are being exchanged with mediators but “negotiations are entirely incompatible with ultimatums, crimes, and threats of war crimes.”
Iranian officials have blasted Trump's weekend threats against infrastructure as incitement to war crimes.
In Islamabad, two senior officials said Pakistan’s efforts for a ceasefire are at an advanced stage but “several spoilers and detractors” are trying to sow confusion through disinformation. The officials spoke on condition of anonymity because they were not authorized to speak publicly about the talks.
Meanwhile, explosions boomed in Tehran and low-flying jets could be heard for hours.
Among those killed was the head of intelligence for Iran’s paramilitary Revolutionary Guard, Maj. Gen. Majid Khademi, according to Iranian state media and Israel’s defense minister.
Israel’s military said it also killed the leader of the Revolutionary Guard’s undercover unit in its expeditionary Quds Force, Asghar Bakeri.
Israel’s defense minister vowed to keep targeting top-ranking officials. “Iran’s leaders live with a sense of being targeted,” Katz said. “We will continue to hunt them down one by one.”
Kuwait, the United Arab Emirates and Saudi Arabia activated air defenses to intercept Iranian missiles and drones as Tehran kept up pressure on Gulf neighbors, which has included strikes against infrastructure like oil fields. In Israel, Iranian missiles hit the northern city of Haifa, where four people from one family were found dead in the rubble of a residential building.
Iran’s attacks on regional energy infrastructure and its hold on the Strait of Hormuz, through which a fifth of the world’s oil is shipped in peacetime, have sent global energy prices soaring.
Brent crude oil, the international standard, rose to $109 in Monday spot trading, about 50% higher than when the war started.
Under pressure at home as consumers worry, Trump has warned Iran that if no deal is reached to reopen the strait, the U.S. would hit power plants and other infrastructure and set the country “back to the stone ages.”
“Tuesday will be Power Plant Day, and Bridge Day, all wrapped up in one,” he threatened Sunday.
Trump has given multiple deadlines to Iran, and has posted: “Tuesday, 8:00 P.M. Eastern Time!” though it was not clear whether he had extended his deadline.
Former Iranian foreign minister Ali Akbar Velayatir urged Arab countries to discourage Trump from striking power plants, warning on social media that the entire region would go “dark” if that happens.
Following Trump’s expletive-laced post Sunday, Iran’s parliamentary Speaker Mohammad Bagher Qalibaf called threats of targeting Iran’s infrastructure “reckless.”
Iran has let some vessels through the strait since the war began with U.S. and Israeli attacks on Feb. 28, but none belong to those countries or ones perceived as helping them. Some have paid Iran for passage but the flow of traffic is down more than 90% over the same period last year.
Thick smoke rose near Tehran’s Azadi Square after an airstrike hit the grounds of the Sharif University of Technology. Multiple countries have sanctioned the university for its work with the military, particularly on Iran’s ballistic missile program.
Araghchi called university “the MIT of Iran,” posting on social media that “Aggressors will see our might.”
Iranian media reported damage to buildings and a natural gas distribution site next to campus. The university is empty as the war has forced all schools into online classes.
A strike near Eslamshar, southwest of Tehran, killed at least 15 people, authorities said. Five were killed in a residential area in Qom, and six were killed in strikes on other cities, the state-run IRAN daily newspaper reported. Three people were killed at a home in Tehran, state television reported.
In Lebanon, where Israel has launched air attacks and a ground invasion that it says target the Iran-linked Hezbollah militia, an airstrike hit an apartment in Ain Saadeh town east of Beirut. It killed an official in the Lebanese Forces, a Christian political party strongly opposed to Hezbollah, his wife and another woman.
More than 1,900 people have been killed in Iran since the war began, but the government has not updated the toll for days.
More than 1,400 people have been killed in Lebanon and more than 1 million people have been displaced. Eleven Israeli soldiers have died there.
In Gulf Arab states and the occupied West Bank, more than two dozen people have died, while 23 have been reported dead in Israel and 13 U.S. service members have been killed.
Rising reported from Bangkok and Magdy from Cairo. Munir Ahmed in Islamabad and Isabel DeBre in Ain Saadeh, Lebanon, contributed to this story.
Nadine Naameh reacts as she looks at the damage to her home following an Israeli strike in the village of Ain Saadeh in the mountains east of Beirut, Lebanon, Monday, April 6, 2026. (AP Photo/Emilio Morenatti)
A man works at the site of Sunday's Israeli strike on a building in Beirut's Jnah neighborhood, Lebanon, Monday, April 6, 2026. (AP Photo/Emilio Morenatti)
Rescue workers and military personnel carry a body of a victim from the rubble of a residential building a day after it was struck by an Iranian missile in Haifa, Israel, Monday, April 6, 2026. (AP Photo/Ariel Schalit)
Pedestrians look at a destroyed building within the Grand Hosseiniyeh, with the mosque visible in the background, which officials at the site say was hit by U.S.-Israeli airstrikes Tuesday, in Zanjan, Iran, Saturday, April 4, 2026. (AP Photo/Francisco Seco)
A man sits beside an Iranian flag banner during a government-sponsored protest attended by medical workers against the U.S.-Israeli military campaign outside Imam Khomeini Hospital in Tehran, Iran, Monday, April 6, 2026. (AP Photo/Francisco Seco)
Medical workers attend a government-sponsored protest against the U.S.-Israeli military campaign outside Imam Khomeini Hospital in Tehran, Iran, Monday, April 6, 2026. (AP Photo/Francisco Seco)
Workers remove debris at Tehran's Sharif University of Technology complex that Iranian authorities say was hit early Monday by a U.S.-Israeli strike, in Tehran, Iran, Monday, April 6, 2026. (AP Photo/Francisco Seco)
Israeli rescue teams search for missing people amid the rubble of a residential building a day after it was struck by an Iranian missile in Haifa, Israel, Monday, April 6, 2026. (AP Photo/Ariel Schalit)
A truck loaded with logs and other vehicles drive along a road toward Tehran near the Turkish border on the outskirts of Razi, northwestern Iran, Saturday, April 4, 2026. (AP Photo/Francisco Seco)
Rescue workers search for victims at the site of an Israeli airstrike that hit a crowded neighbourhood south of Beirut, Lebanon, Sunday, April 5, 2026. (AP Photo/Hussein Malla)
Yemeni soldiers patrol the strategic Bab el-Mandeb Strait, Yemen, Sunday, April 5, 2026. (AP Photo/Abdulnasser Alseddik)
Israeli rescue teams search for missing people amid the rubble of a residential building a day after it was struck by an Iranian missile in Haifa, Israel, Monday, April 6, 2026. (AP Photo/Ariel Schalit)
