LONDON -- Russia and Ukraine exchanged large waves of attack drones overnight into Sunday as the two combatants maneuvered ahead of Friday's planned summit in Alaska between U.S. President Donald Trump and Russian President Vladimir Putin.

One person was killed, and several apartments and an industrial facility were damaged in a Ukrainian drone attack on the south Russian region of Saratov, the governor said on Sunday. Roman Busargin posted on the Telegram messaging app that residents were evacuated after debris from a destroyed drone damaged three apartments in the overnight attack.

Ukraine targeted at least one "industrial" site in the Russian city of Saratov, hundreds of miles from Ukrainian territory, the region's governor said on Sunday, with a former Ukrainian security official telling Newsweek an "oil refinery is still burning.