Sussex Police V2 Radio: "Police were called to Collyer Avenue, Bognor Regis, at around 6am on Wednesday (September 15) following reports of a male in possession of a firearm.
"Officers attended and temporarily closed nearby roads for the safety of the public.
"Police carried out multiple enquiries and determined everyone inside the address was safe and well, with no firearm present. Firearm units were stood down around 7.30am."
Police say no arrests have been made and the roads have since re-opened.