WASHINGTON (MarketWatch) — Satellite radio giant Sirius XM Radio Inc. is petitioning the nation’s communications regulator to block a move by Liberty Media Corp. to gain control of the broadcaster.

Sirius XM Radio SIRI, -0.75% said in a Federal Communications Commission filing on Friday that Liberty Media LMCA LMCB has asked the agency to take “de facto” control of Sirius XM. In the filing, Sirius asked the FCC to dismiss or deny the Liberty application. Read the Sirius XM FCC filing