At least five people, including a 1-year-old child, his mother and grandmother, were killed on Thursday in a nighttime Russian drone strike that hit the northern Ukrainian city of Pryluky, officials said.

Six drones hit a residential area in the city shortly before dawn, according to authorities. The child killed was the grandson of an emergency responder, Ukrainian President Volodymyr Zelensky said.

“One of the rescuers arrived to respond to the aftermath right at his own home,” Zelensky said. “It turned out that a Shahed drone hit it.”