The state fire marshal is looking for the cause of an early morning house fire in Mercer County.

Departments from seven surrounding communities were called out just after 5 a.m. Tuesday after flames were reported in a home on Lake Road just east of Lake Wilhelm in Mill Creek Township.

Firefighters tell 21 News that flames broke out in a bedroom, spreading smoke damage throughout the home.

Crews were on the scene for more than two hours and flames spread to the back of the home.

Everyone got out unharmed. Residents will be staying with relatives.

There were no working smoke detectors in the home.