21.   Phoenix police were investigating to determine the cause of the crash.

22.   Aviation officials were still investigating to determine the cause of the crash, Harenberg said.

23.   Authorities have determined the cause was a discharge of industrial pollution from upriver, but are still investigating to determine the source, the report said.

24.   Capt. Heather Ziemba said the department was investigating to determine what the men used to start the fire and how they got the materials.

25.   Eugene police spokeswoman Jan Power said authorities were investigating to determine if the mailings violate city laws.

26.   He said the country was investigating to determine exactly what happened and whether Peru should pay reparations.

27.   He was allowed to stay in Denmark while the government investigates to determine whether he should face war crimes charges.

28.   Lungu said the cars were being investigated to determine the source of the supply.

29.   Officials were investigating to determine why the service car was on the tracks.

30.   Police said the three were being investigated to determine whether they had intentionally abused their positions to approve the loans which were not processed properly.