One person was injured after a fire broke out at a Centereach home on Wednesday afternoon, Brookhaven Town Fire Marshal Chris Mehrman said.
One person was treated for smoke inhalation and was taken to a local hospital for treatment.
The single-family home, which is on Bernard Place, was moderately damaged by the fire, and it has been deemed accidental, he said.
The investigation was still underway as of 2 p.m., according to Mehrman.
Suffolk police were notified of a fire at around 12:35 p.m. by the county's Fire, Rescue, and Emergency Services, a spokeswoman said. Arson Squad detectives responded to the scene, police said.