A Republican congressman representing the US state of Kansas has apologised for embarrassing his supporters by swimming naked at the holy site of the Sea of Galilee while on a fact-finding mission to Israel.
Freshman US Rep. Kevin Yoder, 36, has not been charged in the Aug. 18, 2011, incident when he and about 20 other lawmakers and staff members jumped into the water.
Politico reported Sunday (local time) that he was the only one among them who wore no clothes.
''I feel incredibly remorseful that I have caused embarrassment to my constituents and I have caused folks who believe in me to be disappointed,'' Yoder told The Kansas City Star.
Some Christians consider the Sea of Galilee a holy site because they believe Jesus walked on water there.
Swimming in the lake is permitted but public nudity is not allowed, according to Israeli police spokesman Micky Rosenfeld.
''If someone walks around the beach naked, that's an offense,'' Rosenfeld said, adding that no official complaint had been made against Yoder. He would not rule out charges, saying it was possible even a year after the offense was committed. ''If that kind of incident takes place and someone makes an official compliant, we'll investigate,'' Rosenfeld said on Monday (local time).
Republican presidential candidate Mitt Romney and running mate Paul Ryan on Monday criticized Yoder.
Romney said the incident was reprehensible and Yoder's actions were a terrible mistake.
Ryan, a Wisconsin congressman, called his colleague Yoder's actions unbecoming.
Politico reported that the FBI opened an investigation into the trip but did not explain why.
Yoder and his chief of staff, Travis Smith, said neither they nor any of their staffers had talked to federal investigators.
''The gravity of the situation and the actions I've taken are not lost on me, and I feel certainly regret at what has occurred, and I just want to apologise to my constituents for a momentary lapse in judgment,'' Yoder said.
Yoder said it was dark and he was in the water for only about 10 seconds. ''Part of the reason I made that decision at that moment was there was really nobody in the vicinity who could see me,'' he said.
''I dove in, hopped right back out, put my clothes on and, regardless, that was still not the behaviour people expected out of their congressman.''
The August 13-21 trip was sponsored by the American Israel Education Foundation, a charity whose mission is to provide grants for educational programs and conferences and to educate politicians and influential people about the importance of the US-Israel relationship.
Eric Cantor of Virginia, the senior Republican on the trip, was furious about the swimming and scolded members for their behaviour, Politico reported.