Russia has limited access to Facebook over the platform's stance on the accounts of several Moscow-backed news outlets amid the invasion of Ukraine.
Russia's communications regulator Roskomnadzor accused the network of "censorship" and violating "the rights and freedoms of Russian citizens".
Facebook said it had refused to stop fact-checking and labelling content from state-owned news organisations.
The move came a day after Russia launched its attack on Ukraine.
It is unclear what the regulator restrictions mean, or to what extent Facebook's parent company Meta's other platforms - WhatsApp, Facebook Messenger and Instagram - are affected.
The regulator had demanded Facebook lift the restrictions it placed on Thursday on state news agency RIA, state TV channel Zvezda, and pro-Kremlin news sites Lenta.Ru and Gazeta.Ru.