A man in his 60s has died in a two-alarm fire at a Lowell house overnight, and the fire likely started with smoking materials, the state fire marshal and other officials said Tuesday.

Firefighters found a man dead while battling a house fire in Lowell, with another person already outside of the burning building.

A man died in a fire in Lowell, Massachusetts, Monday night, officials said. The fire was believed to have started with smoking materials. Neighbors called 911 to report the fire on Chelmsford Street near Grace Avenue about 10:30 p.