Waterborne drones struck the sole bridge connecting Russia to the annexed Crimea peninsula on Monday, in a deadly attack on a vital supply route claimed by Ukraine’s security services.

The explosion hit the Kerch bridge, a major conduit for Russia’s troops in Ukraine, just hours before a crucial deal to export Ukrainian grain was to expire.Kyiv’s navy and SBU security service carried out a “special operation” using seaborne drones, a security service source told AFP. Russian authorities said a civilian couple was killed and their daughter wounded in the attack on the bridge, which was also damaged last year in a blast that Moscow blamed on Kyiv.