Sao Paulo, Aug 3 (EFE) A 15-year-old girl with swine flu symptoms died on a flight from the US to Sao Paulo city in southern Brazil, media reports said Monday.

The teenager died aboard a Copa Airlines plane that arrived at the Sao Paulo airport Sunday.

The Panamanian carrier said two doctors aboard the plane tried to assist the girl, but she was pronounced dead on arrival in Sao Paulo.

The teenager had travelled to Orlando in the US to visit the Disney World.

She acquired swine flu symptoms while in Florida, the tour agency that organised the trip, said.

The girl was examined at an Orlando hospital where the doctors declared she was not infected with the virus.

US health officials allowed the girl to return to Brazil, the tour company said.

Copa Airlines did not say what type of illness the teenager suffered during the flight.

The coroner's office will determine the cause of death.