Flats have been evacuated near to the ss Great Britain in Bristol following a “possible chemical incident”, police said.
Avon and Somerset Police said a cordon has been put in place after the “discovery of items” in one of the flats.
A bomb disposal team has arrived at Gas Ferry Road, the force said.
Residents told the Bristol Post homes were evacuated at about 20:00 BST due to a “threat” to one of the buildings.
The ship is moored in the city and a popular visitor attraction.
A Bristol City Council spokesman said nearby residents have been told to leave their homes and a rest centre has been set up at the nearby Spike Island.