We have reason to believe there could be hostile activity in your area.

"We must make our country as hostile to such activities as other Western countries are."

In fact, there's been no hostile activity from the other side at all.

"Contact our helicopters and ask if they see any signs of hostile activity."

"Your continued hostile activity seems pointless, in the light of that decision."

No signs of hostile activities in this area, but I am greatly concerned.

Israeli officials said they were checking "some charges of hostile activities."

We've encountered no hostile activity for the past thirty hours.

But there have been no reports of hostile activity in this region.

There was no sign of hostile activity or even occupation.