1.   Morris said that police have not determined a motive in the attack.

2.   Although officials said they had not yet determined a motive, they said the students had argued before the shooting.

3.   Authorities had found little to help in determining a motive.

4.   A Police Department spokesman said Saturday that the investigators had not determined a motive for the attack or its specific target.

5.   Burnes said the investigation had not yet determined a motive for the incident in the normally tranquil, traditionally Jewish neighborhood.

6.   But authorities are not close to determining a motive, he said.

7.   But in the most confounding cases, researchers must rely on exhaustive psychological studies to determine suicidal motives, leaving definitive answers unknown.

8.   Detectives had not determined a motive, however, by Thursday afternoon.

9.   Determining the motives of the U.S. creditors for pulling the plug now has drawn criticism from Danish creditors.

10.   If that is the case, agents would face the daunting task of trying to determine the motives of the veteran military and civilian pilot.