Police have declared an emergent situation at Capalaba this afternoon.
Around 3:35pm police were called to a Cassia Court residence in relation to a man inside a shed.
The man is in possession of a firearm inside the shed.
Police have withdrawn and formed a cordon around the address with the emergency being declared at 5.17pm for an area bordering Wildflower Street, Melaleuca Street, Ney Road and Mount Cotton Road.
At this time it is believed no other people are involved and no one has been injured.
If you have information for police, contact Policelink on 131 444 or provide information using the online form 24hrs per day.
You can report information about crime anonymously to Crime Stoppers, a registered charity and community volunteer organisation, by calling 1800 333 000 or via crimestoppersqld.com.au 24hrs per day.