LONDON (AP) _ Two U.S. F-15 fighter jets were reported missing Monday over a Scottish mountain range, the Defense Ministry and police said.

The aircraft, on a training flight from the U.S. base at Lakenheath, 75 miles northeast of London, lost contact with ground control when they were over the Cairngorm Mountains in the Scottish Highlands, a spokeswoman for Grampian police said.

She said the U.S. Air Force had notified several police forces that the planes were overdue.

``The Cairngorm area has been mentioned, but we have had no reports of any planes coming down,'' the spokeswoman said, speaking on condition her name not be used.

A spokesman for the Ministry of Defense confirmed at around 4.30 p.m. (10:30 a.m. EST) that two F-15s ``are currently about 1 1/2 hours late, but we have no other details yet.'' Each had a crew of two, he said.

Charlene Carl, a spokeswoman for the Lakenheath base, said authorities there ``have no confirmation at this time'' but expected to have more information shortly.

Local mountain search and rescue teams were on standby.

With four peaks over 4,000 feet, topped by Ben Macdhui at 4,296, the Cairgorms are Britain's loftiest mountain range.