(Reuters) -Russian forces staged a mass drone attack on the Ukrainian Black Sea port of Odesa early on Saturday, setting ablaze at least one multi-storey apartment building and killing one resident, the city's mayor said.

Russia attacked cities across Ukraine with hundreds of drones and a missile strike, hitting energy infrastructure and wounding at least 15 people.

Russian air defense units intercepted 13 drones flying towards Moscow in under two hours, Mayor Sergey Sobyanin reported at around 1:46 a.m. local time on July 19.