As a GCI base, the 672d's role was to guide interceptor aircraft toward unidentified intruders picked up on the unit's radar scopes.

We found the damaged bird-of-prey under attack by an unidentified intruder.

Although the case is still under investigation, it emerged that the unidentified intruders had been able to study Microsoft's network unobserved for six weeks.

The papers said we were 'unidentified intruders.

I noticed an unidentified intruder on target at 2000 feet.

The supervisor continued trying to make contact with the unidentified intruder.

American soldiers exchanged gunfire with unidentified intruders spotted twice at a United States military installation near the Panama Canal, the United States Southern Command reported today.

Kirk wore the same civilian clothes and jacket he had on when the Calypso had been boarded by the still unidentified intruders.

With a barely perceptible jolt the ship accelerated, leaving the earth's atmosphere and the as yet disorganized attempts at identifying and pursuing a possible unidentified intruder wallowing in its wake.

Although the unidentified intruders took a small amount of money and a few inexpensive objects, the Cardinal's relatives and other Nicaraguans here said they believed the incident was politically motivated.