Russia attacked Ukraine with 113 drones overnight, the Ukrainian air force said on Saturday, adding that it downed 57 of them while 56 others failed to reach their targets -- usually as a result of being jammed by electronic warfare systems.
The air force said Russia also fired one S-400 missile at central Ukraine but that there was no damage from it.
Moscow launches near-daily attacks with dozens of drones at Ukraine in an effort to exhaust its air defenses.