The Navy commander who was taken into custody by Iran with 10 other American sailors on Tuesday — and who appeared on a video apologizing for straying into Iranian waters — graduated from the U.S. Naval Academy in 2011, academy officials confirmed.

Lt. David Nartker, 27, and his fleet were detained after at least one of their vessels experienced mechanical problems near Farsi Island in the Persian Gulf, the AP reported. They were released Wednesday, less than a day after they were captured.

In a video that aired on Iranian TV, Nartker appears to express regret that two vessels sailed into Iranian territory.

“It was a mistake. That was our fault and we apologize for our mistake,” Nartker said in the video. “It was a misunderstanding. We did not mean to go into Iranian territorial water. The Iranian behavior was fantastic while we were here. We thank you very much for your hospitality and your assistance.”

The sailor’s mother, Darlene Nartker, confirmed to The Capital that it was her son in the video. The Navy did not say it was Nartker in the video, the Chicago Tribune reported, but the Navy did confirm Thursday he is a boat captain of a Riverine Command Boat in the Gulf.

Iranian television broadcasts video of one of the 10 U.S. sailors held overnight by Iran after entering Iranian waters by mistake apologizing for the incident. Jan. 13, 2016. (Reuters)

Nartker has been criticized for the apology, with some alleging he violated the military Code of Conduct. Article IV of the Code states: “When questioned, should I become a prisoner of war, I am required to give name, rank, service number and date of birth. I will evade answering further questions to the utmost of my ability. I will make no oral or written statements disloyal to my country and its allies or harmful to their cause.”

Vice President Joe Biden told CBS This Morning the U.S. government did not issue an apology.

(Tribune wire reports)

“There’s nothing to apologize for,” Biden said. “When you have a problem with the boat, you apologize the boat had a problem? No, and there was no looking for any apology. This was just standard nautical practice.”

The U.S. Central Command said: “The video appears to be authentic, but we cannot speak to the conditions of the situation or what the crew was experiencing at the time.” It said the crew was undergoing “the redintegration process and we will continue to investigate this incident.”