NEW YORK — The Walt Disney Co. on Wednesday won U.S. antitrust approval for its $71.3 billion bid for Twenty-First Century Fox’s entertainment assets.

Disney must first sell its 22 regional sports networks, the Department of Justice said. The company has 90 days to sell the networks, with an option to extend for another 90 days.

Fox’s assets have been the target of bidding war between Comcast and Disney. Comcast offered nearly $66 billion for Fox’s assets, which include the FX network and the studio that houses the X-Men franchise.

Fox has the option to consider other offers and Comcast could raise its bid.

Entertainment and telecommunications firms are amassing ever more programming to better compete with companies such as Amazon and Netflix.