The Washington Post reports that Jamie Raskin and Robert Garcia sent a letter to SpaceX on Wednesday night, expressing concern that the company “may not have appropriate guardrails and policies in place” to prevent Russia from illegally acquiring Starlink terminals.

Ukraine claims that Russia has deployed the terminals in occupied areas of eastern Ukraine. SpaceX CEO Elon Musk says, “To the best of our knowledge, no Starlinks have been sold directly or indirectly to Russia.”