CHICAGO, Illinois (AP) -- A woman who may be homeless was being sought for questioning about an apartment fire near Wrigley Field that left three men and a woman dead, authorities said.
Emergency crews responded to four fires within walking distance of each other late Friday and Saturday morning. Three of the fires were quickly extinguished, but the fourth fire spread throughout an apartment building and is being blamed for the deaths of four people.
Witnesses spotted the woman near the smaller fires, said Edward O'Donnell, commander of the police department's bomb and arson unit.
Investigators believe the woman they are seeking may be homeless and was last seen wearing a teal blue shirt, gray sweat pants and clear plastic bags on her feet, O'Donnell said.
O'Donnell said investigators are trying to determine if the fires in the city's Wrigleyville neighborhood are connected.
One small fire was started in a building stairwell, O'Donnell said. Another was reported on a sidewalk and a third was located on a front porch.
He said newspapers and trash were likely used to set the small fires. A homeowner extinguished one of the fires, and the other two were extinguished by the time firefighters arrived, O'Donnell said.
The deadly fire, reported shortly before 7 a.m. Saturday, appears to have started in the front stairwell of a multiunit apartment building.
Police spokeswoman Monique Bond said an investigation would determine whether the fatal fire was deliberately set.
The fire "was pretty severe, so it's probably going to take a while," she said.
Three victims were found in one apartment and one was found in a second apartment, Fire Department spokesman Larry Langford said. Another male victim was hospitalized after jumping from a third floor window, Langford said.
Release of the victims' identities was pending family notification Saturday.
Several firefighters suffered minor injuries putting out the blaze, including smoke inhalation, he added.
The building has more than a dozen units. The fire was contained to the second and third floors, Langford said.