Police are investigating the cause of a fire that extensively damaged a home and injured two people in Bunyan's Cove early Friday morning.

Clarenville RCMP were called to the fire in Bunyan's Cove, which is between Musgravetown and Port Blandford, just after 1 a.m.

Percy Tucker, fire chief with the Bunyan's Cove Volunteer Fire Department, said the fire was blazing through the roof of the home when crews arrived on scene.

A woman, 47, and her son, 30, were able to escape through a bedroom window.

Bunyan's Cove fire

The fire chief says the blaze was already "out of control" when firefighters arrived, and the home was destroyed. (RCMP)

Tucker said the son was at a neighbour's home when he spotted the fire at his home, where his mother was sleeping.

"He went in and he got his mother and he got out through the window of the bedroom, where the fire was spreading through the house," said Tucker.

About 10 firefighters from Bunyan's Cove responded, and Tucker said about 10 more were called in from the neighbouring Musgravetown department.

However, Tucker said there was "no way" to save the home because the fire was already "out of control" when firefighters arrived.

In fact, he said the department's pumper trucks ran out of water and they had to go fill up at a public pumphouse.

"We only got pumper trucks, right, we don't have no hydrant or nothing … we went to the salt water and we have the public pumphouse there and we got water from the public pumphouse."

The fire didn't spread to any neighbouring structures, Tucker said, but the one-story home was destroyed.

The two residents were taken to Dr. G.B. Cross Hospital in Clarenville where they are being treated.

Police did not specify the extent of their injuries.

The cause of the fire is still to be determined, and investigators remain on the scene Friday.