WASHINGTON (AP)

An airline apologised yesterday to nine Muslims kicked off a New Year's Day flight to Florida, after other passengers reported hearing a suspicious remark about airplane security.

One of the passengers on the AirTran flight said the confusion started at Reagan National Airport just outside Washington, D.C., when he talked about the safest place to sit on an airplane.

Orlando, Florida-based AirTran said in a statement that it refunded the passengers' airfare and planned to reimburse them for replacement tickets they bought on US Airways. AirTran also offered to take the passengers back to Washington free of charge.

"We apologise to all of the passengers - to the nine who had to undergo extensive interviews from the authorities and to the 95 who ultimately made the flight," the statement said. "Nobody on Flight 175 reached their destination on time on New Year's Day, and we regret it."

The airline said the incident on the flight from Reagan National Airport to Orlando was a misunderstanding, but the steps taken were necessary.

A U.S. Muslim advocacy group, meanwhile, filed a complaint Friday with the U.S. Department of Transportation. "It is incumbent on any airline to ensure that members of the traveling public are not singled out or mistreated based on their perceived race, religion or national origin," the Council for American-Islamic Relations said.

One of the Muslim passengers, Atif Irfan, said the family probably would not fly home with AirTran because members had already booked tickets on another airline, but appreciated the apology.

"It's definitely nice to hear," he said.

suspicious looks

Irfan said he thought he and the others were profiled because of their appearance. The men had beards and the women wore headscarves, traditional Muslim attire.

"My wife and I are generally very careful about what we say when we step on the plane," he said, adding that they have received suspicious looks in the past. "We're used to this sort of thing - but obviously not to this extent."

Irfan, 29, is a lawyer who lives in Alexandria, Virginia. He was traveling to a religious retreat in Florida with his wife, along with his brother and his family, including three children, ages 7, 4 and 2. They were joined by his brother's sister-in-law and a family friend.

Federal officials ordered the rest of the passengers from the plane and re-screened them before allowing the flight to depart about two hours behind schedule. The family and friend eventually made it to their destination on a US Airways flight.

Christopher White, a federal Transportation Security Administration spokesman, said the security concern on the plane was handled appropriately.

White said the pilot, after being informed of the remarks, requested that two federal air marshals on board remove the nine passengers. TSA then alerted authorities, including the FBI, which conducted an investigation.

"Our role, basically, is to determine whether (those) in question pose a threat," FBI spokesman Bill Carter said.

He and White said that once authorities determined there was no security threat, it was up to the airline on how to proceed.

"If the pilot is uncomfortable with someone flying on their plane, that's their decision," White said.

Discount carrier AirTran Airways is a subsidiary of AirTran Holdings Inc. Its hub is in Atlanta.