11.   Forest fires often occur naturally in remote high-latitude areas, usually caused by lightning.

12.   Fire officials say many were caused by lightning but suspect seven were deliberately set.

13.   Four of the breakdowns stemmed from circuit-breaker glitches, while the fifth is believed to have been caused by lightning.

14.   Koperberg said some fires had been caused by lightning, but authorities were assisting police over seven cases of suspected arson.

15.   Lightning caused a suspension of play at mid-afternoon with half the field still on the course.

16.   The fire was caused by lightning.

17.   He said Texaco officials thought the blaze had been caused by lightning.