MILWAUKEE (AP) — A 9-year-old child was shot and killed early Thursday in Milwaukee, police said, becoming the fourth young gunshot victim in the city in recent weeks.

The child died at a hospital following the shooting, which occurred just after midnight. Police are searching for “unknown suspects,” Capt. Warren Allen Jr. said in an email.

A 10-year-old girl was killed May 31 in Milwaukee while sleeping in her bed. A few weeks earlier, two teenagers were fatally shot by another teen.