21.   Paramilitary groups rarely clash with the army, which sometimes tacitly supports their anti-rebel operations.

22.   Police worried that the opposing groups might clash.

23.   Rival groups have clashed on several occasions in recent days in attempts to impress the visiting envoys.

24.   Rival Kurdish groups clash in northern Iraq.

25.   Rival ethnic groups clash over alleged love affair.

26.   Rival groups of Hindus clashed with each other and police over control of a small temple, police said Monday.

27.   Rival Shiite Muslim groups clashed during a religious ceremony Saturday in southern Lebanon.

28.   Shortly afterward, rival groups clashed and one prisoner was beaten and stabbed to death, police said.

29.   Still, one group of protesters clashed with police at an intersection, and the police withdrew under a hail of rocks and stones.

30.   The bomb went off in a neighborhood of Karachi where rival ethnic groups regularly clash.