Explosions on the Kerch Bridge linking Russia to annexed Crimea have led to the collapse of one span, according to local reports.Russian officials admited that the bridge, a key supply line for Russian troops in Ukraine, was damaged in an “emergency“ situation which killed two people and injured a child.Video shared by local media on Monday appeared to show a section of road on the bridge had split and was sloping to one side.Sergei Aksyonov, a Russia-installed governor, said the emergency occurred on the 145th pillar of the bridge which links the Crimean peninsula to the Russian region of Krasnodar.