21.   They were hard to discern among the tourists and local people who always fill the area, but patrolling plainclothes police officers stopped and questioned suspicious people.

22.   Workers at consulates and embassies were also cautioned to be more observant and to monitor suspicious people and mail.

23.   Passengers are urged to be on the lookout for suspicious people, boxes or bottles.

24.   Bomb squads were to be stationed outside main events, police were to man bus stops, roadblocks went up along main highways to check suspicious people and cars.

25.   Citizens were urged to challenge suspicious people and tell them to keep moving.

26.   Commuters are repeatedly warned to be on the alert for suspicious people or parcels.

27.   Commuters are repeatedly warned to be on the alert for suspicious looking people or packages.

28.   Detectives noticed two suspicious people fleeing the scene and chased them.

29.   Graveyard administrators also were told not to bury and to tell the police about any bodies brought for burial by suspicious people, police said.

30.   Graveyard administrators were told not to bury any bodies and to tell the police about any brought for burial by suspicious people, police said.