51.   Police fired back but the rebel casualties are not known.

52.   Police fired back, but rebel casualties were not known.

53.   Police returned fire, but there was no word on rebel casualties.

54.   Rebel casualties are not immediately available in the clash that followed.

55.   Rebel casualties at the army base were not immediately known.

56.   Rebel casualties were not immediately known in the pre-dawn fighting during which the guerrillas fired mortar shells and rockets, the officials said.

57.   Rebel casualties were not known but a guerrilla boat usually carries a crew of four.

58.   Rebels typically take their dead with them or throw them in the river, making it difficult to estimate rebel casualties, he added.

59.   Reinforcements reached the remote base at dawn and searched the jungles for rebel casualties, he said.