Panama ? The bodies of a California businessman, his teenage daughter and the Panamanian pilot of a plane that crashed over the weekend were found Tuesday in Panama’s mountains, officials said. A 12-year-old American girl survived.

But she suffered multiple traumas and hypothermia, and cold, wet weather prevented authorities from evacuating her immediately from the crash site on the slope of a remote volcano.

Michael Klein, 37, Talia Klein, 13, and pilot Edwin Lasso, 23, were found dead in an uninhabited region of Panama known as Las Ovejas, about 270 miles west of the capital, the civil protection agency said.

The wreckage was located at a hard-to-reach site on the Baru volcano, at an altitude of some 3,500 feet, the civil aviation authority said in a separate statement.

Rescuers were giving medical attention to Francesca Lewis – a friend of Talia’s who was traveling with the Kleins – in a makeshift shelter, said civil protection official Jose Henriquez, who is handling the case.

Aviation authorities said the cause of the crash was not yet known.