A police cordon was put in place after a possible grenade was found near a university campus.
Students were evacuated from one of the main buildings at the University of Lincoln, police said this morning.
Lincolnshire Police confirmed its officers were on the scene at Brayford Pool in the city.
The force said a 100-metre cordon had been set up around the area while investigations were carried out.
Parts of Brayford Wharf North had been closed off as a result.
A tweet from Lincolnshire Police, sent at 10.32am, said: "We are on scene at the Brayford Pool in Lincoln after what may be a grenade has been found.
"As a precautionary measure, a 100mt cordon is in place affecting part of Brayford Wharf North and the university campus.
"Please avoid the area."
The University of Lincoln said that The Minerva Building was the only affected building on campus, and that all other areas remained open.
A spokesperson from the university said: "The Minerva Building on the University’s Brayford Campus has been evacuated this morning at the request of Lincolnshire Police as part of a precautionary 100 metre cordon.
"All other areas of the University campus are unaffected."
The Minerva Building is one of the main buildings on the university campus.
It contains the university's main canteen, student support services, the IT department and the Vice Chancellor's office.
Access to Lucy Tower Street was also cordoned off, affecting use of the multi-storey car park.
A City of Lincoln Council spokesperson tweeted: "There is currently a police cordon in place on the Brayford, following the discovery of what appears to be a grenade.
"The cordon includes our Lucy Tower Street car park.
"You are currently not able to access your vehicle if it is parked there. We will keep you updated."
Police added that the bomb disposal unit was on its way to the scene.
Just before midday, Lincolnshire Police confirmed that the grenade was not live and deemed the surrounding area safe.
The force said: "The EOD team have attended and the suspected grenade is not live, so the area is safe.
"We are lifting the cordons and thank everyone for their help and patience while we dealt with this incident."
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