1.   Constantly observe spectators for suspicious activity.

2.   Detecting suspicious activity in the community is where the bike patrol agents come in handy.

3.   Newspapers admonished citizens to report any suspicious activity, encouraging them to spy on each other.

4.   Sometimes, traders on the stock-exchange floors will report suspicious activity.

5.   We were instructed to report any suspicious activity in the neighborhood.

6.   But everyone is advised to remain on their guard and keep vigilant for any suspicious activity.

7.   A network of farmers and gamekeepers used CB radios to alert each other about suspicious activity.

8.   Darlington police want to speak to anyone who may have seen suspicious activity around the health authority offices at the estimated time of the incident.

9.   Police are asking for any witnesses to come forward if they saw suspicious activity near the garage at any time on Saturday night.