Firefighters have extinguished a house fire in Braddon early this morning. 

At about 5.15am, ACT Fire & Rescue responded to reports of a house fire on Ijong Street.  

Upon arrival, the house was well alight with fire through the roof.

Fire crews worked from several stations worked for more than two hours to bring the fire under control.

An ACT Policing spokesperson said no people were injured, however significant damage was caused to the property. 

Following initial investigations the fire was deemed suspicious, and police are investigating the circumstances surrounding the incident. 

Police would like to speak to anyone who witnessed suspicious activity in the vicinity of Ijong Street prior to 5.20am this morning, or who may have dash-cam footage from the area before or during the fire. 

Anyone with information that could assist police is urged to contact Crime Stoppers on 1800 333 000, or via the Crime Stoppers ACT website. Please quote reference number 7735912. Information can be provided anonymously.