71.   The police are sometimes alerted to caches by hikers and picnickers.

72.   The police are alerted and surround the bank.

73.   The sound of gunfire activated an alarm, which alerted police.

74.   The supervisor alerted the police, who arrested Poplawski and closed off the southern wing of the building.

75.   The two alerted the police, who instructed them to call child welfare officials.

76.   They alerted police, who informed the missing persons unit and stations across the territory.

77.   They also alerted police to write down any suspicious stops they made in areas known for prostitution.

78.   Thinking she might still be alive, he said, they pulled her from the water and alerted police.

79.   Other drivers alerted local police, who called the FBI.