31.   Russian officials blamed the blasts on Chechen rebels.

32.   Russian officials blamed the blasts on the rebels.

33.   Russian officials blamed those blasts on Chechen rebels.

34.   Russian officials blamed those blasts on the rebels.

35.   Russian officials blamed the blasts on terrorists from Chechnya, and the bombings served as justification for a renewed military campaign in the separatist region.

36.   Russian security chief Ivan Rybkin and Chechen separatist leaders blamed the blast on forces opposed to the peace agreements in Chechnya.

37.   Some blamed the blast on methane gas, while others cited coal dust.

38.   Such blasts are often blamed on business disputes or on terrorists from Chechnya, where Russian forces are fighting rebels.

39.   Sri Lankan authorities blamed the blast on Tamil Tiger separatist rebels.

40.   Sri Lankan authorities blamed the blast on Tamil Tiger separatists.