11.   Para-military riot police patrolled the area early Tuesday to prevent further trouble.

12.   Police said the extra security was needed to prevent possible trouble following the ouster of former Finance Minister and Assembly member Sam Rainsy.

13.   Police boarded the ship to prevent any trouble between crew members and customs officers as they checked the cargo, the officer said.

14.   Amid lingering tensions, special security precautions have been undertaken in and around the premises to prevent trouble.

15.   Alomar was booed in Cleveland last weekend, and security has been beefed in hopes of preventing any trouble.

16.   But women should not start taking hormones simply to prevent heart trouble.

17.   Civil servants in both nations are already considering ways of preventing crowd trouble from marring the tournament.

18.   Community leaders and police met Saturday to try to prevent trouble on Saturday night.

19.   He has ordered other Hamas activists arrested as a means of preventing trouble.

20.   In Tirana, police were out in force to prevent more trouble.