41.   Police said they were investigating the explosion at the Diyal Singh College.

42.   Police were investigating the explosion.

43.   Russia and its separatist region of Chechnya are cooperating in investigating the explosion, the report said, adding that police believe someone may have commissioned the bombing.

44.   Provincial Police Chief Masood Shah said three investigation teams have been set up to investigate the explosion.

45.   Sergei Yushenkov, who with Berezovsky chairs the political movement Liberal Russia, said the group would ask the Council of Europe to investigate the explosions.

46.   The explosion was being investigated by detectives attached to Operation Good Hope, formed earlier this year to investigate urban terrorism.

47.   The Georgian parliament created a special commission to investigate the explosion, Interfax said.

48.   The National Transportation Safety Board is investigating that explosion, believed to have been caused by a leaking cooking gas line.

49.   The NATO-led force sent a team to investigate the explosions with helicopters, tanks and an ordnance team sealing off the area.

50.   The officials, speaking on customary condition of anonymity, said the explosions were being investigated.