Explosions caused 2 bridges in western Russia to collapse, officials say. 7 people were killed

Explosions caused two bridges to collapse and derailed two trains in western Russia overnight, officials said Sunday, without saying what had caused the blasts. In one of the incidents, seven people were killed and dozens were injured.

The first bridge, in the Bryansk region on the border with Ukraine, collapsed on top of a passenger train on Saturday, causing the casualties. The train's driver was among those killed, state-run Russian Railways said.

Hours later, officials said a second train derailed when the bridge beneath it collapsed in the nearby Kursk region, which also borders Ukraine.

In that collapse, a freight train was thrown off its rails onto the road below as the explosion collapsed the bridge, local acting Gov. Alexander Khinshtein said Sunday. The crash sparked a fire, but there were no casualties, he said.

Russia’s Investigative Committee, the country’s top criminal investigation agency, said in a statement that explosions had caused the two bridges to collapse, but did not give further details. Several hours later, it edited the statement, which was posted on social media, to remove the words “explosions” but did not provide an explanation.

The committee said that it would be investigating the incidents as potential acts of terrorism.

Rescue workers cleared debris from both sites, while some of those injured were transported to Moscow for treatment. Photos posted by government agencies in Bryansk appeared to show train carriages ripped apart and lying amid fallen concrete from the collapsed bridge. Other footage on social media was apparently taken from inside vehicles on the road that had managed to avoid driving onto the bridge before it collapsed.

Bryansk regional Gov. Alexander Bogomaz announced three days of mourning for the victims, starting Monday.

Damage to railway tracks was also found Sunday by inspectors working on the line elsewhere in the Bryansk region, Moscow Railway said in a statement. It did not say whether the damage was linked to the collapsed bridges.

In the past, some officials have accused pro-Ukrainian saboteurs of attacking Russia’s railway infrastructure. The details surrounding such incidents, however, are limited and cannot be independently verified.

Ukraine’s military intelligence, known by the Ukrainian abbreviation GUR, said Sunday that a Russian military freight train carrying food and fuel had been blown up on its way to Crimea. It did not claim the attack was carried out by GUR or mention the bridge collapses.

The statement said Moscow's key artery with the Russian-occupied Zaporizhzhia region and Crimea has been destroyed.

Russia forces have been pushing into the region of Zaporizhzhia in eastern Ukraine since Moscow's full-scale invasion in February 2022. Russia took Crimea and annexed it in 2014.

Follow AP’s coverage of the war in Ukraine at https://apnews.com/hub/russia-ukraine

In this photo released by Russian Emergency Ministry Press Service telegram channel on Sunday, June 1, 2025, emergency employees work at a damaged bridge in Russia's Bryansk region, which borders Ukraine. (Russian Emergency Ministry Press Service telegram channel via AP)

Emergency medics transport a wounded passenger at the railway station in Moscow, Russia, Sunday, June 1, 2025, after a road bridge collapsed on top of a passenger train in the Bryansk region, located on Russia's border with Ukraine. (AP Photo)

This photo released by Moscow Interregional Transport Prosecutor's Office telegram channel on Sunday, June 1, 2025, a view of a damaged bridge after the crash of a freight train in Russia's Kursk region, which borders Ukraine. (Moscow Interregional Transport Prosecutor's Office telegram channel via AP)

In this photo released by Moscow Interregional Transport Prosecutor's Office telegram channel on Sunday, June 1, 2025, emergency employees work at a damaged bridge in Russia's Bryansk region, which borders Ukraine. (Moscow Interregional Transport Prosecutor's Office telegram channel via AP)

In this photo released by Moscow Interregional Transport Prosecutor's Office telegram channel on Sunday, June 1, 2025, an emergency employee works at a damaged bridge after the crash of a freight train in Russia's Kursk region, which borders Ukraine. (Moscow Interregional Transport Prosecutor's Office telegram channel via AP)

In this photo released by Moscow Interregional Transport Prosecutor's Office telegram channel on Sunday, June 1, 2025, emergency employees work at a damaged bridge in Russia's Bryansk region, which borders Ukraine. (Moscow Interregional Transport Prosecutor's Office telegram channel via AP)

This photo released by Acting Governor of the Kursk Region Alexander Khinshtein telegram channel on Sunday, June 1, 2025, shows a view of a damaged bridge after the crash of a freight train in Russia's Kursk region, which borders Ukraine. (Acting Governor of the Kursk Region Alexander Khinshtein via AP)

NEW YORK (AP) — The U.S. stock market is slipping Thursday after oil prices resumed their climb.

The S&P 500 fell 0.3% and is on track for a fourth drop in five days after setting its all-time high. The Dow Jones Industrial Average was down 83 points, or 0.2%, as of 1:01 a.m. Eastern time, and the Nasdaq composite was 0.4% lower.

A halt in the torrid run for stocks benefiting from the artificial-intelligence boom has slowed the U.S. market recently. Not even another better-than-expected profit report from Nvidia was enough to kick it back into gear.

The chip company reported stronger profit and revenue for the latest quarter than analysts expected, while also forecasting revenue for the current quarter that cleared analysts’ estimates. “The buildout of AI factories — the largest infrastructure expansion in human history — is accelerating at extraordinary speed,” CEO Jensen Huang said.

But such performances and such talk have become routine, and Nvidia's stock swiveled between losses and gains before falling 1.4%.

Some analysts said the weakness may have simply been because investors were locking in profits after Nvidia’s stock had soared nearly 70% over the prior year, more than double the S&P 500’s 27% jump. The broad AI industry is also getting criticism for becoming too expensive, as well as too circular as Nvidia has bought ownership stakes in companies that use its own chips that drive Nvidia’s revenue.

Pressure built on Wall Street, meanwhile, as the price for a barrel of Brent crude oil climbed 1.7% to $106.81 and trimmed its loss for the week. Oil prices have been swinging up and down with uncertainty about how long the war with Iran will keep the Strait of Hormuz shut, which is preventing oil tankers from exiting the Persian Gulf to deliver crude.

The higher oil prices pushed Treasury yields upward in the bond market, resuming rises following a slowdown the day before.

Climbing yields have cranked up the pressure on financial markets worldwide. They're slowing economies and weighing on prices for stocks and all kinds of other investments. Besides driving up rates for mortgages, high yields could also curtail companies’ borrowing to build the AI data centers that have been supporting the U.S. economy’s growth recently.

The yield on the 10-year Treasury rose to 4.61% from 4.57% late Wednesday.

It had gotten near 4.63% in the morning, after a report gave the latest signal that the U.S. job market remains in better shape than economists expected. The number of U.S. workers applying for unemployment benefits last week unexpectedly declined in an indication of fewer layoffs.

But yields eased a bit following a mixed preliminary report showing weaker-than-expected growth for business activity among U.S. services businesses and improved growth for U.S. manufacturers. Companies are feeling the effects of accelerating inflation and are seeing subdued growth in their order books, the preliminary data from an S&P Global survey said.

“The damaging economic impact from the war in the Middle East is becoming increasingly evident in the business surveys,” according to Chris Williamson, chief business economist at S&P Global Market Intelligence.

Inflation is worsening even beyond the high oil prices caused by the Iran war, while U.S. households are showing widespread discouragement about the economy.

Elsewhere on Wall Street, Walmart fell 7.2% following its profit report. The retailer delivered another quarter of impressive revenue but offered up weaker forecasts for upcoming profit than analysts expected.

On the winning side of Wall Street was Ralph Lauren, which jumped 12.2% after reporting stronger profit and revenue for the latest quarter than analysts expected.

In stock markets abroad, indexes were mixed in Europe following bigger moves in Asia.

South Korea’s Kospi Kospi soared 8.4% thanks to strength for technology stocks. Samsung Electronics jumped 8.5% after its labor union and management reached an agreement late Wednesday that averted a strike. SK Hynix, a chip company partnering with Nvidia, surged 11.2%.

Tokyo’s Nikkei 225 jumped 3.1%, while indexes fell 1% in Hong Kong and 2% in Shanghai.

AP Business Writers Matt Ott and Elaine Kurtenbach contributed.

Trader Aaron Ford works on the floor of the New York Stock Exchange, Thursday, May 7, 2026. (AP Photo/Richard Drew)

Trader Edward McCarthy works on the floor of the New York Stock Exchange, Wednesday, May 13, 2026. (AP Photo/Richard Drew)

A Global Medical Response helicopter sits in front of the New York Stock Exchange before the planned IPO of GMR Solutions, Inc., Wednesday, May 13, 2026. (AP Photo/Richard Drew)

A person walks in front of an electronic stock board showing Japan's Nikkei index at a securities firm Monday, May 18, 2026, in Tokyo. (AP Photo/Eugene Hoshiko)

Currency traders watch monitors at the foreign exchange dealing room of the Hana Bank headquarters in Seoul, South Korea, Wednesday, May 20, 2026. (AP Photo/Ahn Young-joon)

A currency trader talks on the phone near a screen showing the Korea Composite Stock Price Index (KOSPI) and the foreign exchange rate between U.S. dollar and South Korean won, left, at the foreign exchange dealing room of the Hana Bank headquarters in Seoul, South Korea, Wednesday, May 20, 2026. (AP Photo/Ahn Young-joon)