81.   Other people saw what happened, however, and alerted police.

82.   Police were alerted after neighbors in the town of Durango reported an explosion at the apartment Thursday morning.

83.   Police were alerted by another neighbor of the farmer who heard about the missing chopper on the news, he said.

84.   Police were alerted by witnesses before the man jumped but could not arrive at the scene in time to save him.

85.   Press reports say police were alerted when the model boat was put up for sale at a London art dealership.

86.   Passengers pulled the emergency cord to alert police, and two of the youths were arrested.

87.   PLUS workers, suspicious of the content of the package, had alerted the police.

88.   Police were alerted by a man who saw the envelopes in a garden next to the hotel.

89.   Police were alerted by a security guard who watched some of the transactions and thought the bargains were too good to be true.

90.   A bus driver alerted police to a suspicious passenger.