Investigators are treating the Brooklyn fire that killed five people over the weekend as a homicide and are asking for the public's help in tracking down any possible leads.

The fire broke out Saturday morning near the building's entryway and stairwell on 86th Street in Bensonhurst.

The Fire Department says it was intentionally set.

Officials say a man who escaped from the third floor and who may have information on the fire has only now come forward, because he was afraid for his immigration status.

Officials are asking anyone else who has any information to come forward.

"We're looking for anyone that may be afraid to come forward, someone that may have been in the building," said NYPD detective Louis Yero. "We believe we have spoken to everyone that was in the building, but we won't know until someone comes forward and says that they were. And again, if they're afraid to come forward, we're not looking to hurt anyone, we're looking for their help, we're looking to help them as a matter of fact."

"If they are afraid to come to the police, they could come forward to our church. We have the office open basically 24:7 at 8754 or 8750 17th Avenue," said Reverend Erick Salgado.

Luisa Ordoñez de Chan, a Guatemalan immigrant, was killed as she tried to save her two children.

She strapped her two-month-old daughter Maria Maura in her car seat and tossed her out the window. In the chaos and confusion, a neighbor was unable to catch the baby. She suffered a fractured skull, but a local pastor says she s expected to be okay.

"Baby is in stable condition,” said Pastor Robert Eric Salgado. “She has a fracture, but there is no permanent damage."

Her two-year-old son and husband also made it out alive.

He says before getting overtaken by the flames and smoke, his wife shared her last words.

"'You have to take care of my son and daughter,'" said her husband, Miguel Chan. "I promise I will do it."

It is believed that as many as 20 immigrants lived in two apartments in the building. Neither apartment had working smoke detectors.

Anyone with information about the fire is being asked to contact Crime Stoppers by calling 1-800-577-TIPS, by texting TIP577 to CRIMES, or by going to NYPDCrimeStoppers.com.