PHILADELPHIA (AP) -- Fire officials are investigating the cause of a blaze that raced through a block of row homes in Philadelphia, killing three 4-year-olds and a baby.
Investigators planned to return to the scene Sunday, a day after the fire engulfed at least 10 homes.
Among the dead are 4-year-old twins, Maria and Marialla Bowah. Their father, Pennoh Davis, tells WPVI-TV that they loved Sunday school and music.
Four-year-old Patrick Sanyeah and 1-month-old Taj Jacque also died in the blaze.
The twins' mother and three of their sisters escaped the fire through a second-floor window and were taken to a hospital.
A neighbor, Jeff Boone, tells The Philadelphia Inquirer that he saw a couch on fire on a porch and says the flames jumped across the row of houses.
Fire department officials say there is no immediate word on how many others were injured in blaze that destroyed eight rowhomes and engulfed a total of 10 houses.
Authorities tell The Associated Press the fire started shortly before 3 a.m. Saturday, and was brought under control by about 4 a.m. There is no immediate word on what caused the fire.
Fire Commissioner Derrick Sawyer calls the incident a "tragic day."
Sawyer says, "This is a tragic, tragic day for the city of Philadelphia. We lost four children today."