John Street: Man is detained after Derry operation ends
A man in his 30s has been detained after a security operation at an apartment block in Londonderry.
The incident began at about 14:30 GMT on Monday at flats at John Street, close to Craigavon Bridge, and ended just after 20:00 GMT.
Police said they had concerns for the welfare of a man who was in a distressed state in one of the flats.
Residents had to be moved from their homes for several hours.
Specialist police units and other emergency services were involved in the operation.