A bomb scare closed off part of Gloucester Docks this lunchtime.
A suspect black luggage bag, abandoned in the Victoria Basin, was checked out by police officers.
Security guards turned people away from the area while an investigation was carried out.
A boater from the basin phoned police after finding the suspect bag.
But by 12.30pm police had opened the bag and didn't find anything suspicious.
They are now tracing the owner.
One security officer said: "There was nothing there in the end. They are looking for the owner now."
Citizen reporter Mike Wilkinson, who lives in The Docks, said: "It caused quite a stir in the Victoria Basin for a while as there were a lot of shoppers and tourists about."