Chicago - A fire at a Chicago apartment building that appears to have been deliberately set killed four people Tuesday, including three children, police said.

It took around 200 firefighters three hours to put out the blaze, which began around 1:30 a.m. in a three-story building in the South Chicago neighborhood. Witnesses said they saw residents leap from windows to escape.

A preliminary investigation indicated a person returned to the building after a domestic dispute and set fire to the rear porch, police spokesman Anthony Guglielmi said. Officers were searching for a “person of interest wanted for questioning,” he said.

An infant was pronounced dead at a hospital, and two other girls — ages 4 and 6 — and a man were found dead later on the third floor, said Deputy Fire Commissioner Arriel Gray.... Read More: VIN