An object found near a house at Derramore Park has been declared a hoax after an examination by an Army bomb disposal team.
The alert was raised by a resident at about 12.30pm and the examination was completed at about 3.45pm
Chief Inspector Andy Lemon has condemned those who left the object.
"This device caused a great deal of local inconvenience, with about 30 people having to be moved from their homes on a bitterly cold day.
"I would ask anyone with information about the incident to contact the detectives at Magherafelt station on the 101 non-emergency number."