NEWRY – Thursday morning’s fire inside a condominium at Sunday River Ski Resort was caused by carpet padding placed too close to a propane heater, Maine Department of Public Safety spokesman Steve McCausland said.

Workmen were installing a new carpet that morning inside unit H1 at 55 Easy St. in the South Ridge Townhouses complex, McCausland said.

The $252,000 three-story unit is owned by Janet Przygoda of East Greenwich, R.I.

Two fire investigators from the State Fire Marshal’s Office determined that when the men left for lunch about 10:30 a.m., one rolled-up section of padding caught fire, igniting the interior, McCausland said.

The blaze, which drew about 40 firefighters from six towns and extensively damaged the inside of the unit, was ruled accidental, he said.

There were no injuries.