MILWAUKEE (AP) — Two 3-year-old boys have been shot in Milwaukee in separate incidents over a span of 48 hours.

The Journal Sentinel reports that a 3-year-old boy was in critical condition after he was struck by gunfire Saturday evening in an apparently accidental shooting.

It wasn’t immediately clear who shot the boy. Three-year-old Akai W. Stilo died on Friday after he accidentally shot himself. Mayor Cavalier Johnson is urging people to store their guns in a safe place.