WATERBURY, Conn. (AP) — A fire broke out early Thursday at an apartment building for the elderly and disabled, forcing firefighters to use a ladder truck to rescue residents from upper floors and leaving 16 people injured, authorities said.

The fire in the Eastgate complex was reported shortly before 4 a.m. in a first-floor apartment and sent smoke throughout the four-story building. Four apartments were declared uninhabitable.

Two female residents were in critical condition at Bridgeport Hospital, and a man was in fair condition, hospital spokesman John Cappiello said. The man and one of the women were in the hospital's burn treatment center.