Six Muslim imams were removed from a US Airways flight at Minneapolis-St. Paul International Airport and questioned by police for several hours before being released, a leader of the group said. The six were among passengers who boarded Flight 300, bound for Phoenix, around 6:30 p.m. Monday, airport spokesman Pat Hogan said. A passenger initially raised concerns about the group through a note passed to a flight attendant, according to Andrea Rader, a spokeswoman for US Airways. She said police were called after the captain and airport security workers asked the men to leave the plane and the men refused. "They took us off the plane, humiliated us in a very disrespectful way," said Omar Shahin, of Phoenix. The six Muslim scholars were returning from a conference in Minneapolis of the North American Imams Federation, said Shahin, president of the group. Five of them were from the Phoenix-Tempe area, while one was from Bakersfield, California, he said. Three of them stood and said their normal evening prayers together on the plane, as 1.7 billion Muslims around the world do every day, Shahin said. He attributed any concerns by passengers or crew to ignorance about Islam.