“It is shameful to use the national tragedy of 9/11 to promote a business,” said Brett Eagleson, whose father Bruce died in the terrorist attacks

The sports betting company DraftKings has apologized for using the 9/11 terrorist attack as a marketing tool on Monday, the 22nd anniversary of the attack on the United States that killed nearly 3,000 Americans.

The app advertised a special one-day promotion where fans could make bets on New York-based sports teams, including the New York Yankees, the Mets and the Jets, writing “Never Forget” above the option.

“We sincerely apologize for the featured parlay that was shared briefly in commemoration of 9/11,” the company tweeted later in the day. “We respect the significance of this day for our country and especially for the families of those who were directly affected.”

The apology came after the company was slammed across social media for what many saw as an insensitive use of the 9/11 anniversary.

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Brett Eagleson, whose father Bruce was killed in the 9/11 attacks, told the Associated Press that he found the company’s use of 9/11 “tone deaf” and called it “shameless.”

“It is shameful to use the national tragedy of 9/11 to promote a business,” Eagleson told the AP. “We need accountability, justice and closure, not self-interest and shameless promotion.”

Eagleson, who was 15 when his father died, also spoke out to The Washington Post.

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“9/11 is not a closed chapter in many, many Americans’ lives … and to try to use the day as a marketing opportunity because of Monday Night Football or whatever, I think is a disgrace,” he told the newspaper.

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Others took to social media to decry the company for the promotion.

“I’ve seen a lot of stupid things but the draftkings 'Never Forget' 9/11 Parlay has to be in the top 3,” one social media user wrote.

“There's bad ideas and then there's DraftKings' 9/11 themed parlay,” another social media account added.

“I cannot believe this is real,” another social media user tweeted. “Brands, do us a favor, take the day off.”

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