31.   Green-uniformed officers patrol its dusty gray paving, backed by plainclothes police whose cover often is blown by the crackling walkie-talkies tucked in their waistbands.

32.   Heavily armed police and prison officers patrolled the south of the city in pick-up trucks, responding to tips from residents.

33.   Many officers patrol on foot.

34.   More security officers are patrolling the streets, and a lane of the road in front of the NPC venue is closed to all traffic.

35.   Motorcycle-riding gunmen believed to be the same group then killed a policeman and fatally wounded another as the officers were patrolling a road on foot.

36.   Navy spokeswoman Lt. Cmdr. Katherine Goode said military security officers were patrolling the area to ensure no one was on the range and would detain anyone who is found.

37.   Officers patrolled outside the barricaded buildings of the IMF and World Bank, where world financial powers were meeting.

38.   Officers patrolled the streets and parked a tank in the main street leading to the sector.

39.   Officers also patrolled with megaphones, urging people to stay in their homes.

40.   Officers patrolled with sniffer dogs and combed the damp lawn with metal detectors, apparently searching for shell casings.