un attentat

a terrorist attack

→ un
phrase Rare #46,210
a terrorist attack Usually refers to a violent attack carried out for political or ideological reasons. The plural is « des attentats »; the article changes with context, as in « d'un attentat » meaning “because of an attack.”
FR: La police enquête sur un attentat dans la capitale.
EN: The police are investigating a terrorist attack in the capital.

On dirait qu'il y a eu un attentat.

It looks like there’s been a terrorist attack.

— Femmes au bord de la crise de nerfs (1988)

Ce n'est pas un attentat!

It's not a terrorist attack!

— Your Name. (2016)

C'était un attentat.

It was a terrorist attack.

— Perfect Blue (1998)

Cette zone est bouclée à cause d'un attentat terroriste.

This area has been cordoned off because of a terrorist attack.

— Akira (1988)