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"Parts Unknown" indeed. A snafu at a cable operator in Boston led to pornography airing on the channel designated for CNN for about 30 minutes late on Thanksgiving night.

According to local reports, subscribers of RCN cable in the Boston area were surprised to find hard-core porn airing on CNN's channel around 11 p.m. ET Thursday, when CNN was carrying a rerun of the Anthony Bourdain culinary travelogue series "Parts Unknown."

Jeff Carlson, senior VP and general manager of RCN Boston said the company was "in the process of researching this incident but see no evidence our CNN network feed was compromised last evening in Boston."

There was no mention of the error on RCN's social media feeds as of noon ET Friday. But viewers were quick to comment on the situation.

cnn porn airing  tweet
RCN serves about 298,000 subscribers in the Boston, New York, Philadelphia and Washington, D.C. The porn-CNN swap appeared to only be an issue in the Boston area.

RNC was acquired earlier this year for $1.6 billion by private equity giant TPG.