ISLIP - Investigators are trying to determine if an Islip woman killed in a house fire was living there illegally.

The flames began in a detached garage on Wilson Boulevard just before 9 a.m. yesterday. After firefighters doused the flames, they found Dori Costa near a back door.

The 46-year-old was rushed to the hospital, but she could not be saved. Islip Town officials say they're looking to see if the garage was illegally converted into an apartment.