31.   Police sealed off the area around the government buildings.

32.   Police sealed off the area around the school and were searching for two suspects, Doria said.

33.   Police sealed off the area for investigation, Yonhap said.

34.   Police sealed off the area where the block was found and arrested the person who sold the material.

35.   Police sealed off the factory site after the explosion, preventing reporters gaining access.

36.   Police sealed off the quarter to keep away gawkers.

37.   Police sealed the area and searched the car for explosives, but found none.

38.   Police sealed the borders of Plateau state to keep violence from spreading beyond Jos, the capital.

39.   Police sealed their offices and launched an inquiry.

40.   Police then sealed the offices, pending new search warrants.