Army bomb disposal experts have been called to deal with an unexploded device uncovered by workmen at the back of the Three Swans public house in the Water Hill Lane area of Selby.
The device was reported to North Yorkshire Police who have set up a 100 metre cordon around the area as a precaution. The roads have been closed around the cordon.
More top news
Longest cold spell of winter so far. Bitterly cold with further wintry showers, significant snowfall likely over hills
Demonstrators will gather in Lincoln this morning to protest against proposed cuts to the city's local fire service.
Jon Mitchell with tonight's weather