alerted
v.
使（某人）保持警觉( alert的过去式和过去分词 );
使意识到;
提醒（某人）注意（某事）;
使（部队）处于待命状态;
例句:
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The mystery hero imme-diately alerted police after spotting a bomb.
那个无名英雄发现炸弹后马上报了警。
来自柯林斯例句
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The 23-year-old's screams alerted a passerby who went to her rescue.
那个23岁女孩的尖叫引来了一位过路人前去营救。
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Neighbours heard the sound of rifle fire and alerted the police.
邻居们听到了步枪声，就报了警。
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Indeed, Berkshire has not alerted the likely successor.
来自THETIMES
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Last year, the IRS alerted me to a mistake.
来自WSJ
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Mr. Davis said the person alerted police in the neighborhood.
来自WSJ