Two policemen were killed when gunmen opened fire on their patrol vehicle.

当持枪歹徒对巡逻车开枪射击时，两名警察中弹身亡。

《柯林斯英汉双解大词典》

The trio were working with special forces carrying out a routine security patrol with Afghan forces when their vehicle was struck by a bomb blast and came under small arms fire.

遇袭时，这三人正与特种部队成员及阿安全部队执行例行的巡逻任务，他们乘坐的车辆遭爆炸袭击后受到轻武器火力攻击。

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The previous week unseen gunmen had opened fire on a joint patrol of American marines and Afghan soldiers.

上周，一拨行迹诡异的枪手攻击了参加联合巡逻的美军陆战队士兵和阿富汗士兵。

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In London, the Ministry of Defense said the soldier, who was attached to the 21 Engineer Regiment, was killed by small arms fire at Patrol Base Hazrat.

NPR: Afghan Soldier Kills British Soldier, Wounds 6

It isn't clear what caused the fire, but Arturo Montiel, a spokesman for the highway patrol, said the fire was concentrated in the rear of the car, and not in the engine column.

WSJ: Limo Fire on Bridge Kills Five

The westbound lanes of the bridge were closed as officers investigated the cause of the deadly fire, but the patrol said one lane of traffic reopened early Sunday.

NPR: Patrol: 5 Die In Limousine Fire On Calif. Bridge