incident

警方正在调查一起不幸的事件。

The police are investigating an unfortunate ___incident.

一名青少年在周六晚上的枪击事件中严重受伤。

A youth was seriously injured in a shooting ___incident on Saturday night.

警方正在调查昨晚发生的一起严重事件。

The police are investigating a serious ___incident that occurred last night.