At least seven people have been killed and dozens more injured following two separate bridge collapses in Russia's western regions bordering Ukraine, Russian authorities confirmed on Sunday.

In Bryansk region, a road bridge collapsed onto railway tracks late Saturday, causing a passenger train bound for Moscow to derail. Bryansk Governor Alexander Bogomaz reported that the disaster claimed seven lives and left 66 people injured, including three children.

"There are seven dead as a result of the collapse of a bridge onto railway tracks," Bogomaz stated via Telegram. Videos circulating on Russian social media showed emergency crews working through mangled wreckage while survivors called for help.

In a separate incident in the neighboring Kursk region, another rail bridge collapsed overnight in the Zheleznogorsk district, derailing a freight train. The locomotive driver was injured when part of the train fell onto the road below, according to Kursk Governor Alexander Khinshtein. The train crew was hospitalized with various injuries.

Moscow Railways, the state-owned operator, initially attributed the Bryansk incident to "illegal interference in the operation of transport" – terminology often used to suggest sabotage or external attacks. However, this reference was reportedly later removed from the company's official statement.

Russian prosecutors have launched investigations into both collapses, though no official causes have been determined. Emergency services, including rescue teams and repair trains, were dispatched to both sites, while ambulances were positioned at Moscow's Kievsky railway station awaiting injured passengers from the Bryansk derailment.

Ukraine has not commented on the incidents. Russia has previously accused Ukrainian forces of orchestrating sabotage attacks against its railway network, which serves as a critical infrastructure for transporting military personnel and equipment for its operations in Ukraine.

These incidents add to a growing list of infrastructure failures and attacks inside Russia since the beginning of the Ukraine conflict in 2022, with railways being frequent targets.

The bridge collapses come at a sensitive time, ahead of potential diplomatic talks between Russian and Ukrainian officials in Istanbul, part of renewed U.S.-led efforts to seek an end to the nearly three-year conflict.