No one had noticed suspicious activity late Saturday night or Sunday morning.

With regular monitoring, you'll be able to notice unauthorized activity or fraud quickly.

Almost two hours after the goods train had left, he noticed sudden activity around the warehouse.

We're keeping all the lights off inside, of course, to reduce the chance that he'll notice activity up here.

She half noticed activity as citizens took their turns behind the bark, feeding the tree.

Someone might have noticed unusual activity around the place.

"We did notice considerable local activity on the way in," Tuvok acknowledged.

As he mulled that over he noticed activity on the computer.

Having noticed very little further activity over the weekend, the motel manager and his nephew decided to check on the room.

He said he had noticed increased activity in the last few years.