71.   Police said they had been unable to determine the motive of the attack.

72.   Police said they still had not determined the motive for the attack and were questioning suspects known to have anti-American sentiments.

73.   Police said they have not determined a motive but believe that the crime was not random and that the victim may have known his attacker.

74.   Police said they were seeking witnesses and had not determined the motive of the attack.

75.   Several justices commented Wednesday how difficult it can be to prove such a negative, and also how hard it is determining the motives of multimember governmental bodies.

76.   School and law enforcement officials were trying to determine a motive.

77.   The ethnicity of the driver and the gunmen was not immediately known, and officials have not determined the motive.

78.   The newspaper said police have not determined a motive for the crimes.

79.   The Royal Ulster Constabulary said investigators were trying to determine a motive for the bombing outside the Boundary Bar.

80.   The spokesman refused to say whether police have determined the motive of the attack.