Aerosmith lead singer Steven Tyler was treated Thursday at Rapid City Regional Hospital for injuries suffered in a fall during a show at the Buffalo Chip Campground Wednesday night.

Tyler, 61, injured his head, neck and shoulder when he accidentally stepped off the "thrust," a runway perpendicular to the existing stage which allows a performer to get closer to the audience. Tyler had been entertaining the crowd with his spinning and dancing during the song "Love In An Elevator," when he took three or four steps backwards and fell into the crowd.

On Thursday afternoon, Aerosmith announced on its Twitter page that the rock band's concert tonight in Winnipeg had been postponed. The Calgary Herald reported that subsequent Aerosmith concerts across western Canada next week would go on as scheduled.

It is not the first injury suffered by Tyler on his current tour. The lead singer hurt his leg while jumping on a stage at a concert in Uncasville, Conn., on June 28, which led to the postponement of seven shows in July.

A fan, Lance Yellow Robe, who said he was close to the stage when Tyler fell, said, "You could kind of see it coming because he was dancing all over the stage." Yellow Robe said he saw blood on Tyler's arm.

Many in the crowd thought it was part of the act, said Jessica Kokesh, a University of South Dakota journalism student who covered the concert for the Journal.

"We thought maybe he stage-dived into the crowd, but he didn't get back up," Kokesh said. "I thought he was falling back to crowd surf."

Immediately after Tyler's fall Wednesday night, security guards lifted the singer back onto the stage as the rest of the band kept playing.

"There was like a big sigh, a collective 'Whoa' from everybody," said Chuck Baker, 53, of Denver, who was about 20 rows from the stage when Tyler fell.

Tyler, conscious, raised his fist in salute before the emergency personnel took him backstage, where he was attended to by Dr. Jeff Anderson, an emergency room physician who happened to be attending the concert, according to a news release from the Buffalo Chip. Tyler was then airlifted to Rapid City Regional Hospital, but his injuries did not appear to life-threatening.

"He sustained minor injuries to the head and neck as well as a shoulder injury," said Dr. Anderson. "He was in good spirits. His vitals were stable."

Some fans said they were frustrated that they paid $120 for a concert that lasted about 50 minutes and included fewer than 10 songs. Buffalo Chip owner Rod Woodruff, however, said the band had played almost its entire set when the accident happened.

Woodruff said it was the first time anyone had fallen off the concert stage at the Chip. He said the main stage is 60 feet wide but the thrust is only about eight feet wide.

Jennifer Horton, Rapid City Regional Hospital's vice president of public relations and marketing, said early Thursday that Tyler wasn't in the hospital directory. Under the privacy laws, that means the person is either not there or chooses not to be included in the directory, according to the hospital's Web site.

Law enforcement officials at the daily rally media conference in Sturgis said Tyler had been treated at the hospital and released. Aerosmith's public relations staff did not return phone calls to the Journal on Thursday.

Woodruff said the rest of the Aerosmith band had left the Chip by Thursday morning.

Woodruff said the Aerosmith concert was probably the biggest crowd ever at the Buffalo Chip, but he declined to give specific figures. He said attendance overall at the Chip this year is the largest in the campground's history.

Woodruff said other than Tyler's accident, putting on the Aerosmith concert went well.

"I'd have to say that the Aerosmith experience was one of the most pleasant experiences we've ever had," Woodruff said. "There were just no problems. They are so easy to get along with."

Woodruff said the Buffalo Chip doesn't have a doctor on staff but that there are always physicians attending the concerts.

Tyler, known for hits such as "Walk This Way" and "Dream On," attended the Sturgis rally last year to promote his Dirico Motorcycles line and was back this year on behalf of Dirico and to perform at the Buffalo Chip.