An explosion has led to the closure of a major road near an army barracks.
North Yorkshire Police received a report at 3am on Saturday after an explosion was heard in the Catterick area.
There are no reports of any injuries, but the A1 motorway is closed at Catterick.
The A1 runs adjacent to Marne Barracks, formerly RAF Catterick. The 1st Battalion, Duke of Lancaster’s Regiment, has a base at Catterick.
A spokeswoman for North Yorkshire Police said they do not know how close the explosion was to the barracks.
“At the moment it’s only a heard explosion,” she said, but she added it did come from that area.
There have not been any evacuations.
A spokesman for Catterick Garrison said the inquiry was police-led and did not have any information about how close the explosion was to the barracks.
On the Ministry of Defence website, Catterick Garrison is described as the army’s “largest training establishment”.
It covers 2,400 acres and 20,000 acres of training land.
Catterick Garrison provides a base for Headquarters 4th Infantry Brigade and Headquarters North East which forms part of 1st (United Kingdom) Division, according to the MoD website.
There are over 13,000 personnel, military, civilian and their dependants, living and working in the area.