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US broadcaster CBS is warning viewers about a potential blackout on DISH Network in the coming days.

During its Sunday 60 Minutes broadcast, the network issued an alert that said viewers could soon lose access due to carriage deal negotiations.

“Even as more and more DISH customers turn to digital antennas for free access to their local channels, we recognise that many continue to rely on their pay-TV package to get these stations,” the satellite operator said. “For those customers, we are actively working to reach a fair deal before the contract expires, knowing that only CBS can force a blackout of its channels.”

It added: “DISH has successfully negotiated agreements representing hundreds of stations in recent months that benefit all parties, including our viewers. We are unsure why CBS decided to involve customers in the contract negotiation process at a point when there is still time for the two parties to reach a mutually beneficial deal.”

It's not clear when the existing retransmission agreement expires, but the deadline could be as early as this week, according to reports.