Russia said it could target U.S. commercial satellites if they are used to help Ukraine, expanding its threats of reprisals to a new theater that could hit closer to home for American interests.

Konstantin Vorontsov, a senior official in Russia’s Foreign Ministry, told a meeting of the First Committee of the United Nations General Assembly that if U.S. satellites are used to aid Kyiv, then they “may be a legitimate target for a retaliation strike,” Russia’s state news agency TASS reported.

“We would like to emphasize an extremely dangerous trend that has clearly manifested itself in the course of the events in Ukraine,” Mr. Vorontsov said in remarks at the U.N. on Wednesday. “We are talking about the use by the United States and its allies of civilian infrastructure components in space, including commercial ones, in armed conflicts.”

Mr. Vorontsov, who is deputy director of the Russian Foreign Ministry’s Department for Nonproliferation and Arms Control, didn’t name any company, but Elon Musk recently pledged that his company SpaceX would continue to fund access for the Ukrainian government to its Starlink satellite-internet system.