WESTPORT — The cause of a fire that claimed the home of former Westport Police Chief Ron Malone on Cross Highway is undetermined.

Fire officials have no reason to believe it was intentional, Fire Marshal Edward Zygmant said Thursday. Because there were multiple possible sources of ignition in the area where the fire began, he said, the department cannot confirm definitively what specifically sparked the blaze.

Assistant Fire Chief Michael Kronick said a call came in at 6:02 a.m.April 24 from Malone, who was trapped in the house.

First at the scene, Westport police officers rescued Malone from a first-floor window as firefighters arrived.

Westport firefighters, aided by Fairfield firefighters, extinguished the fire and rescued two dogs that were still in the house.

EMS transported Malone to the hospital, where he was treated for smoke inhalation. Malone served as Westport police chief until 1990. He was on the Representative Town Meeting for more than 15 years.

The blaze at 189 Cross Highway caused extensive fire and smoke damage to the single-family, Cape Cod-style house. The cause of the fire is under investigation by the Fire Marshal’s Office.

The fire’s cause is officially undetermined, and fire officials have no reason to believe it was intentional, Fire Marshal Edward Zygmant said Thursday evening. Because there were multiple possible sources of ignition in the area where the fire began, he said, the department cannot confirm definitively what specifically sparked the blaze.