BRIDGEPORT - (AP) - Bridgeport officials say a fire at apublic housing complex has killed a mother and her three children Firefighters say they responded to the P.T. Barnum complex atabout 1 a.m. Friday and pulled the four victims from an apartment. Firefighters contained the blaze to the one apartment. State fire marshals have been called to the scene to help cityauthorities with the investigation. The cause of fire isn't clear.