The Skins got a call alerting them to Lawrence's arrival a minute before he turned up.

Keep an eye out for more guards; we don't know who's been alerted to our arrival.

Japanese forces were alerted to the convoy's arrival shortly before daybreak on December 28.

The abrupt lurch of the braking ambulance alerted them to their arrival.

He tapped out the code on the door to alert them to his arrival.

The Health Department had called ahead to alert the hospital to the girl's imminent arrival and to her probable diagnosis.

There was the communications ansible, by which the family alerted the system to their arrival.

I will alert the security forces to your arrival.

"And why is it that we were not alerted to your arrival?"

And generally, when you're on a special mission, you don't want to alert the local bad guys to your arrival.