Investigators exploring whether grenades found at apartment caused blast that killed 3 LA deputies

LOS ANGELES (AP) — Authorities are looking into whether grenades recovered from a Santa Monica apartment complex were the cause of an explosion last week at a Los Angeles County Sheriff’s Department training facility that killed three members of its arson and explosives unit.

The three members had assisted local police following the discovery on Thursday of grenades at an apartment complex in Santa Monica.

Meanwhile, as detectives chase leads into the origins of the grenades following the deadly blast at the Biscailuz Training Facility, investigators served a search warrant Monday morning at an address in the Marina del Rey neighborhood. The department didn't say what, if anything, was found.

It was not known whether the grenades had any connection to the military. The Los Angeles County Sheriff’s Department spokesperson Nicole Nishida said investigators were looking at all leads.

The deaths early Friday marked the department’s worst loss of life in a single incident since 1857, when four officers were killed by gunfire, Los Angeles County Sheriff Robert Luna said.

The department identified the deputies who died as Detective Joshua Kelley-Eklund, Detective Victor Lemus and Detective William Osborn. They served 19, 22 and 33 years in the department respectively, Luna said.

Luna said Friday that it took more than four hours to render the scene safe and the deaths were being investigated by the department’s homicide detectives, with the assistance of the FBI and the Bureau of Alcohol, Tobacco, Firearms and Explosives. No one else was injured, he said.

The sheriff said the arson and explosives team undergoes in-depth training and responds to more than 1,000 calls a year.

Los Angeles County Sheriff Robert Luna gets a hug from Supervisor Kathryn Barger as he arrives for a press conference after three members of the department were killed in an explosion at a training facility on Friday, July 18, 2025, in Los Angeles. (AP Photo/Etienne Laurent)

Police and emergency vehicles are in place at the scene of a blast at the Biscailuz Center Training Academy in East Los Angeles on Friday, July 18, 2025. (KABC-TV via AP)

Sheriff's deputies stand along a procession route near where an explosion at a training facility killed three deputies on Friday, July 18, 2025, in Los Angeles. (AP Photo/Eric Thayer)

Los Angeles County Sheriff Robert Luna wears a band over his badge after three members of the department were killed in an explosion at a training facility on Friday, July 18, 2025, in Los Angeles. (AP Photo/Etienne Laurent)

DALLAS (AP) — Sen. John Cornyn stood in the shadow of the U.S.-Mexico border wall for a campaign event, but the Texas Republican didn’t offer the kind of diatribe about illegal immigration that stokes his party’s core and fueled Donald Trump’s rise to the White House.

Instead, Cornyn, in his courtly Houston drawl, politely thanked Trump for billions in federal dollars to reimburse Texans for work on the wall, praising “the president of the United States, to whom I am very grateful.”

Cornyn's characteristic calm and measured comments betrayed the urgency of the moment for the four-term senator. He's facing the political fight of his long career against two Republicans who claim closer ties to Trump and his MAGA movement and tend more toward fiery rhetoric. Now, Cornyn could become the first Republican Texas senator to lose renomination in a race that may reflect what GOP primary voters are looking for in their elected officials — and what it takes to survive in Trump’s Republican Party.

Some say the 73-year-old former Texas Supreme Court justice represents a bygone era in the GOP. Still, Cornyn, supporters and the Senate’s Republican leadership are fighting aggressively for an edge in the March 3 primary. They have spent tens of millions of dollars, much of it against his opponents, Attorney Gen. Ken Paxton and Rep. Wesley Hunt — both self-styled Trump Republicans.

“We’ve got enough performance artists here in Washington,” Cornyn told The Associated Press, “people who think serving as a representative in the world’s most distinguished representative body — that what qualifies them — is they are loud, they are active on social media and they get a lot of attention.”

Paxton entered the race in April, having emerged from legal troubles that had shadowed his political rise, including beating a 2023 impeachment trial on corruption charges and reaching a deal to end a long-running securities fraud case.

The three-term attorney general has portrayed the investigations against him as persecution by the political establishment, much like Trump has. He contends Cornyn has “completely lost touch with Texas.”

Hunt is still working to raise his profile in Texas. The two-term House member often touts his early endorsement of Trump's 2024 comeback campaign.

Of Cornyn, Hunt recently said, “His moment has passed.”

Hunt's entry in the race last fall made it more likely that no candidate will win at least 50% of the primary vote, sending the top two finishers to a May runoff. The nominee would face the winner of the Democratic primary between Rep. Jasmine Crockett and state Rep. James Talarico.

Mike Fleming, an 80-year-old retired sales manager who attended a recent Hunt campaign event, said Cornyn is a good man but has spent “a lot of his time trying to run for head of the Senate.” Cornyn unsuccessfully ran for Senate majority leader after the 2024 elections.

“If he was the only guy, I would vote for him,” Fleming said.

Cornyn and aligned super PACs have heavily outspent Paxton and Hunt, investing more than $30 million since last summer on television advertising, much of it criticizing his rivals, according to the ad-tracking service AdImpact.

Senate Republican leaders, however, have worried that Paxton, as the nominee, would be costly to defend in the general election. Cornyn's situation is more about a shift in Republican campaign priorities and what candidates need to do to win a GOP primary.

“He plays the part of the distinguished statesman. And that’s what he’s always been,” said Wayne Hamilton, a former executive director of the Texas Republican Party. “But anymore, you have to be very loud about the opposition. And that’s just not him.”

Cornyn also fights a perception among some GOP voters that he’s a moderate.

“He hasn’t been consistent in his conservative representation in his voting,” said Robyn Richardson, 50, from suburban Dallas.

Some Texas conservatives remain angry about Cornyn's work as the GOP’s negotiator on gun restrictions in a 2022 law in the weeks after the shooting at Robb Elementary School in Uvalde, Texas, where 19 students and two teachers were killed. Democrats narrowly controlled Congress and hoped to enact major changes under President Joe Biden.

The measure didn't go as far as Democrats wanted, but the bipartisan bill was the widest-ranging gun measure passed by Congress in decades. Some Republicans wanted any bill blocked, and a week before its passage, some GOP activists booed Cornyn as he took the stage at a state convention.

Some point to Cornyn being dismissive of Trump during his 2016 campaign and before his 2024 campaign and to his dismissal of Trump's claims of widespread election fraud after he lost to Biden in 2020. Those claims by Trump were debunked.

Cornyn was even skeptical early on about the border wall he took credit for helping finance, calling Trump “naive” in proposing it before he sealed the 2016 Republican presidential nomination. Paxton has pointed to that comment, portraying Cornyn as “opposing the border wall.”

The episodes certainly weren't helpful for Cornyn, who has worked to show Texas Republicans where he and Trump agree.

Cornyn aired ads featuring him with Border Patrol agents along the wall, promoting his support to secure $11 billion for Texans' work on it. Another ad promoted Cornyn's 99% support for Trump's agenda, including his three U.S. Supreme Court nominees.

But the disagreements are small compared with the broader shift Cornyn has resisted.

Vinny Minchillo, a veteran Republican consultant in the Dallas area, referred to Cornyn as “an old George W. Bush Republican, which is now a bad thing” since Trump’s rise.

Cornyn was elected attorney general in 1998, winning when a new national conservative figure was rising out of Texas, the newly reelected Gov. George W. Bush, who was elected president two years later.

The Bush name, once a three-generation fixture in Texas politics, quietly disappeared when then-Texas Land Commissioner George P. Bush, grandson and nephew of two presidents, lost his challenge of Paxton for attorney general in 2022.

“I think there is certainly some level of John Cornyn fatigue,” Minchillo said. “He’s been on the ballot in Texas for a long, long time.”

As of last week, Trump had endorsed dozens of Republican lawmakers in Texas. But he is not expected to endorse ahead of the Senate primary, according to people familiar with the White House thinking but who were not authorized to speak publicly.

That would leave Cornyn among only three incumbent Republican senators seeking reelection who have not received Trump's public backing, with Maine's Susan Collins and Louisiana's Bill Cassidy.

Cornyn acknowledged he's “not somebody who cries out for attention at every opportunity.”

Instead, in the final weeks of the primary campaign, he's hoping voters consider which candidate would be the most effective at getting things done — because he believes they'll support him if they do.

“Sometimes people make the distinction between a workhorse and a show horse,” he said. “And I’m happy to be a workhorse.”

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Beaumont reported from Des Moines, Iowa. Hanna reported from Topeka, Kan. Maya Sweedler contributed from Washington.

Sen. John Cornyn, R-Texas, walks through the Capitol, Thursday, Jan. 15, 2026, in Washington. (AP Photo/Allison Robbert)

FILE - Sen. John Cornyn, R-Texas, introduces Brooke Rollins during a Senate Agriculture, Nutrition, and Forestry Committee hearing on her nomination for Secretary of Agriculture, Jan. 23, 2025, in Washington. (AP Photo/Jacquelyn Martin, File)