The Russian military said its air defences shot down 337 Ukrainian drones over 10 Russian regions overnight in what appears to be the biggest Ukrainian drone attack on Russia in three years, hours before key Ukraine-US talks were to start on Tuesday.

The attack, which killed one person and wounded several, came as a Ukrainian delegation was to meet with America’s top diplomat in Saudi Arabia about ending the three-year war with Russia. There was no immediate comment from Ukrainian officials on the attack.