Police have made an emergency declaration under the Public Safety Preservation Act (PSPA) in relation to reports of an armed man in Caloundra West this morning.
Around 8am, the 22-year-old attended a Rosewood Street address and became involved in a verbal altercation with a woman.
It is understood the man made verbal threats before leaving the property on foot claiming to be in possession of a firearm.
The declaration was made at 9.40am encompassing Queen Street, Bowman Road, the Esplanade and Edmund Street.
Police are not aware if the man is still armed but are taking all necessary precautions, his current whereabouts are not known.
The man is described as approximately 170cm tall, Caucasian, fair complexion with mousey light hair.
Police are urging anyone who sights the man or has any information regarding his current whereabouts to not approach them and to immediately call Triple Zero (000).