PYONGYANG, North Korea — Dennis Rodman led an auditorium of North Koreans in singing "Happy Birthday" to their leader on Wednesday, a day after the former U.S. basketball star sparked controversy by appearing to suggest a Korean-American was to blame for his captivity in North Korea.

Rodman brought a team of fellow former National Basketball Association stars to the North Korean capital, Pyongyang, to mark the birthday of leader Kim Jong Un with an exhibition game. The birthday is believed to have been on Wednesday though that has not been confirmed.

"It started out as surreal, then people joined in and it sort of faded a bit, but it seemed pretty heartfelt from Rodman's side," said Simon Cockerell, a tour guide who watched the game in Pyongyang, said of Rodman's birthday singing.

"It was unexpected, and probably unplanned," he said. "Kim Jong Un appeared to smile, but he didn't appear to expect it."

Cockerell, whose company Koryo Tours took a group of tourists to the game, said the audience had stood and cheered Kim for up to six minutes when he appeared with his wife.

"Dennis Rodman gave a charmingly shambolic speech where he thanked Kim Jong Un and his wife for showing up, along with the other players for being brave enough to come with him and join in his 'engagement effort'."

This was Rodman's fourth trip to Pyongyang. On previous visits, he spent time dining as a guest of Kim, with whom he says he has a genuine friendship, though he did not meet Kim on his third trip.

The visit come weeks after the execution of Kim's uncle, Jang Song Thaek, who until then was one of the most powerful figures. South Korean President Park Geun-hye has described events in North Korea as a "reign of terror."

Rodman has said he would not interfere in North Korea's politics but he raised an outcry at home when, in a television interview on Tuesday, he appeared to suggest that Korean-American missionary Kenneth Bae was to blame for his captivity.

During an expletive-ridden interview with CNN about his trip, Rodman seemed to say Bae, held in North Korea since November 2012 and convicted in May on charges of crimes against the state, was responsible for his situation.

"If you understand what Kenneth Bae did. . . . Do you understand what he did in this country? Why is he held captive in this country?" Rodman said, declining to respond to questions to clarify what he meant.

Bae's sister, Terri Chung, said her family was "outraged" by his comments and he could "do a lot of good" by using his access to the North Korea leader to advocate on Bae's behalf, rather than "hurl outrageous accusations" at her brother.

"He is playing games with my brother's life," Chung said in a statement. "There is no diplomacy, only games, and at my brother's expense."

"He is clearly uninformed about Kenneth's case, and he is certainly not in any position to pass judgment," Chung said, adding that Bae never had hostile intentions against the state.

"ONLY 31"

Asked about Rodman's comments, White House spokesman Jay Carney told reporters, "I'm not going to dignify that outburst with a response," emphasizing that the trip was private travel that was not endorsed by the U.S. government.

"I'm simply going to say that we remain gravely concerned about Kenneth Bae's health, and continue to urge DPRK authorities to grant his amnesty and immediate release on humanitarian grounds," Carney said.

Bae, 45, was sentenced to 15 years of hard labor for state subversion in North Korea. He was detained in 2012 as he led a tour group through the northern region of the country. The country's Supreme Court said he used his tourism business to form groups aimed at overthrowing the government.

Following a visit to her son in October, Bae's mother, Myunghee Bae, said her son was "alone and ailing."

A devout Christian, Bae has acknowledged he conducted religious services in North Korea, which has long been hostile to Westerners advocating religious causes.

U.S. Rep. Eliot Engel of New York, the leading Democrat on the House Foreign Affairs Committee, criticized Rodman and the other Americans for what he called an "ill-advised" trip.

"As North Korean dictator Kim Jong Un continues to starve and oppress his citizens, it is unthinkable that a few fading celebrities would use such an opportunity to reward his brutal regime," he said.

Rodman has faced both ridicule and harsh criticism for his trips to North Korea, which some U.S. politicians and activists view as serving only as fodder for North Korean propaganda.

But he defended his visit, saying it would help "open the door" and was a "great idea for the world."

"It's amazing how we thrive on negativity. Does anyone know this guy's only 31 years old?" he said of Kim, whom he calls his friend.