Part of a building site has been cordoned off after a suspected ordnance was found, police have said.
Devon and Cornwall Police said a 100m (328ft) section of the site in Martin Street, Plymouth, had been closed off after it received reports of the object being found there at 11:40 GMT.
The Royal Navy confirmed its Devonport-based bomb disposal team, Bravo Squadron, had been dispatched to the scene.
A police spokesperson added the incident was ongoing and people have been asked to avoid the area while attempts were made to identify the ordnance and make it safe.
