Alarms summon reinforcements every time they are tripped, rather than only once.

That was their plan, no doubt; to have this man delay him whilst they summoned reinforcements.

Unable to summon reinforcements in time, the young prince must make a stand to protect his people.

One of the Auxiliaries got away and managed to summon reinforcements.

Fafhrd thought it wise to attack before the statue summoned reinforcements.

One guard with access to a panic button, which would summon heavy reinforcements immediately.

He left-to look for my book, or maybe to summon reinforcements.

However this proved little since they could summon reinforcements on the spot by radio.

You will not be able to summon reinforcements, nor transport out of the room.

The police have summoned reinforcements from around the Czech Republic.