Three men, two who appeared to be armed with guns, broke into the back yard of a Banks property in the early hours of Saturday morning, police say.
Police said one of the men had been wearing a balaclava and a light-coloured puffer jacket.
"About 3.30am a resident of a house on Chalker Circuit was awoken by noises at the rear of the premises. The resident discovered a vehicle and a shed had been entered, and an attempt had been made to enter the house, but those responsible had left the scene," police said in a statement.
"Subsequent examination of CCTV footage from the premises revealed three men, two with what appear to be firearms, had been in the back yard."
Police ask anyone with information that could assist them to contact Crime Stoppers on 1800 333 000, or at the Crime Stoppers ACT website. Please quote reference 6419218.