Hours later came a report of another bridge collapse, also in western Russia, involving a freight train. By Ivan Nechepurenko and Caroline Houck A bridge overpass in western Russia collapsed late Saturday,

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.

Russia’s top investigative body is opening criminal probes into the collapses in Kursk and Bryansk. More than 70 people were injured, officials said.