21.   Israeli military sources said they were investigating to see if a mortar or rocket was fired into a farm field.

22.   Israeli military sources said they were investigating to see if mortars or rockets were fired into a farm field at Nahal Oz kibbutz.

23.   Israeli military sources said they were investigating to see if mortars or rockets were fired into a farm field at the Nahal Oz kibbutz.

24.   Magistrates began investigating to see if any laws were violated in running the campground at that location, RAI said.

25.   Once found, its human counterpart can be investigated to see if it causes trouble in people.

26.   Police said they were investigating to see whether to press charges.

27.   Police said they were investigating to see if the shooting was part of a turf war between rival mobsters or the result of a holdup.

28.   State officials are investigating to see if disciplinary measures should be taken.

29.   The Justice Department later said it was investigating to see whether the Calvin Klein ads broke child pornography laws.

30.   The nearby city administration building also caught fire, and authorities were investigating to see if the blaze in the rail car was the cause.