51.   It was not clear which of the dozen underground groups attacked the soldiers.

52.   It was not immediately clear who was responsible for the attack, but various leftist, Kurdish and Islamic underground groups are known to be active in the city.

53.   Jha said nine officers were killed last year while trying to crush underground militant groups.

54.   Lee himself made three trips in recent years, during which he said he met with underground North Korean church groups.

55.   Most were associated with underground groups that have tried to blow up the mount in the past but were thwarted by Israeli security.

56.   No one immediately claimed responsibility for the explosion, but both a leftist underground group and Kurdish rebels have carried out similar attacks throughout the country recently.

57.   On Tuesday, an underground Islamic group in the kingdom threatened to attack U.S. forces unless jailed Muslim militants are freed.

58.   Responsibility for the bombing was claimed by an underground group calling itself Black Mamba, after a poisonous snake.

59.   Raiders of Islamic Great East, an underground terrorist group which supports Islamic rule, claimed responsibility for the attack in telephone calls to newspaper bureaus.

60.   Security forces killed three suspected members of the leftist underground group Dev Sol in a clash Thursday near this eastern town, police said.