Bridgeport officials say a fire at a public housing complex has killed a mother and her three children.

Firefighters say they responded to the P.T. Barnum complex at about 1 a.m. Friday and pulled the four victims from an apartment.

Officials tell WTNH-TV that a mother, her 4-year-old twins and her 5-year-old child have all died. Their names haven't been released.

Firefighters contained the blaze to the one apartment.

State fire marshals have been called to the scene to help city authorities with the investigation. The cause of fire isn't clear.