A police source says a wedding guest's gun went off accidentally at New York's swanky Waldorf Astoria Hotel and four people suffered minor injuries from debris.

The incident happened at 7:25 p.m. Saturday in the Park Avenue hotel's lobby.

A police official with knowledge of the investigation says the wedding guest's gun discharged and the bullet hit the floor. He spoke on condition of anonymity because the investigation was ongoing. He says four people were hit by either shrapnel from the bullet or pieces of the floor.

The shooter was placed under arrest.

A Fire Department spokesman says the four victims were taken to hospitals with minor injuries.

The Waldorf Astoria is one of New York's best-known hotels. It's where the U.S. president stays during the United Nations General Assembly.