Their alarm was tripped the first week, scaring off the intruder.

Might be bad for Ben if any alarms get tripped by accident.

But no, it was only a recorded message that directed him to start the lift moving again, before the alarm was tripped.

His hypertuned engine gives him the speed he needs to be in and out of an enemy base before a single alarm is tripped.

The alarm had probably been tripped when they breached his front door or a window.

Somehow, an alarm was tripped, and the alarm company called 911.

A burglar alarm had not been tripped, he said.

When the alarm was tripped early yesterday, the security company notified the police.

Silent alarms had definitely been tripped, and Tezwan reinforcements would be here any second.

And at last, when it was ten thousand million miles away, automatic alarms were tripped.