21.   The authorities have called the fire arson, but have established no motive.

22.   The ministry official said no motive had been established.

23.   The police official, who spoke on condition of anonymity, said that investigators had failed to establish a motive for the killing.

24.   The police did not indicate whether they had established a motive.

25.   They said the papers could help them establish a motive if they decide to charge them with murder.

26.   Police have not established a motive for the slaying or a cause of death.

27.   Police have not established a motive or identified any suspects in the deaths, and are investigating the possibility that they were related to either a kidnapping or robbery.

28.   Police have not established the motive for the murder.

29.   Police have yet to interview Bryant and had not established a motive for the attack.

30.   Police made no immediate arrests and did not establish a motive for the killing.