A South African court has dropped charges against US socialite Paris Hilton after her arrest at a World Cup game.

Ms Hilton was arrested in Port Elizabeth after the Netherlands' defeat of Brazil in the quarter-finals of the tournament.

She appeared at a special court on Friday evening.

The details of her charges have not been released and the court hearing went ahead behind closed doors.

Ms Hilton is the great-granddaughter of the founder of the Hilton hotel chain.

She appeared in the court wearing a beige dress and a glittery necklace with her hair in two ponytails, a reporter said.

She appeared briefly in the special court set up to process cases during the World Cup before being taken into another room, reports said.

Paris was detained and questioned by police, after someone in her entourage allegedly was caught smoking marijuana at the Nelson Mandela Bay Stadium, where the World Cup is held.Paris has been released and cops even apologized for misidentifying her.