A security alert in Holywood, Co Down has now ended.
A section of the Old Hollywood Road near the Palace Barracks was closed to traffic on Saturday morning during the operation.
It ended just after 11am.
A PSNI spokesman said an object was examined and found to be "nothing untoward".
A number of Army units are based at the barracks, including The Royal Scots.
It also hosts MI5's headquarters in Northern Ireland.