41.   Pinpointing the cause of the disappearance is time-consuming and difficult given U.S. authorities cannot reach the wreckage, he said.

42.   A study here is unlikely to pinpoint any causes but might be a valuable jigsaw piece.

43.   Airline spokesman Nguyen Chan was quoted by Vietnam News as saying that it was too early to predict or pinpoint the causes of the crash.

44.   Airline spokesman Nguyen Chan was quoted by Vietnam News as saying it was too early to pinpoint the causes of the crash.

45.   An autopsy confirmed that jockey Chris Antley sustained head injuries, but it failed to pinpoint the cause of death.

46.   Arson was suspected at the Co-Op complex, but authorities had not yet pinpointed the cause.

47.   Asked to describe the key to his change in fortunes, Kjus could not pinpoint a cause.

48.   Authorities could not pinpoint the cause of the fire.

49.   Bomb disposal experts were examining the shed to try to pinpoint the cause of the explosion.

50.   Cooked foods, including chicken, soup and sausages, were ruled out, Kan said, adding that more efforts will be made to pinpoint the cause.