MOSCOW — The Russian authorities blocked the website of a prominent opposition leader Thursday after he refused a court order to remove a posted video accusing a high-ranking official of accepting a bribe from a rich businessman.

The order against the opposition leader, Aleksei A. Navalny, extended to the American service providers Instagram and YouTube, with Instagram coming under criticism from Mr. Navalny after some content was deleted from its accounts.

“Instagram decided to comply with Russian illegal censorship requests and deleted some content about oligarch Deripaska,” Mr. Navalny said on Twitter. “Shame on you, Instagram!”

By Thursday afternoon Google, the parent company of YouTube, had yet to remove Mr. Navalny’s video.

Last week, a politically connected aluminum tycoon, Oleg V. Deripaska, filed a lawsuit against a 21-year-old model and blogger, Anastasia Vashukevich, accusing her of sharing details of his private life. In 2017, Ms. Vashukevich posted video material and photographs from 2016 on her Instagram account that showed Mr. Deripaska sailing on his yacht with a deputy prime minister, Sergei E. Prikhodko.