terrorist incident; act of terror
Refers to a specific event or attack carried out by terrorists, often used in news reports.
昨夜、都心でテロ事件が発生した。
A terrorist incident occurred in the city center last night.
警察はテロ事件の容疑者を逮捕した。
The police arrested a suspect in the terrorist attack.
Compound of テロ (from English 'terror') and 事件 (incident, affair).