приехала полиция

the police arrived

→ приехать
phrase Rare #36,461
the police arrived Приехала agrees with полиция, which is grammatically feminine singular in Russian. The phrase can also refer to the police coming or arriving, depending on context.
RU: Приехала полиция, и все сразу успокоились.
EN: The police arrived, and everyone immediately calmed down.

Приехала полиция.

The police arrived.

— С меня хватит! (1993)

Почему приехала полиция?

Why did the police come?

— Во время грозы (2018)

Приехала полиция, надела ей наручники и увезла!

The police arrived, put her in handcuffs, and took her away!

— Страх и ненависть в Лас-Вегасе (1998)