A Greek military transport plane with 59 people on board disappeared from radar screens Tuesday while attempting to land in bad weather northeast of Athens, Greece's air force said.

The C-130 Hercules was flying from a military airport in Elevsina, south of the capital, to the Nea Ankhialos military airport near the central port of Volos.The Greek air force said the plane, with 55 soldiers and four crew members, disappeared at 12:50 (4:50 a.m. MST) but gave no further details.

Military sources, speaking on condition of anonymity, said they feared the plane crashed on mile-high Mount Othris as it was beginning its final approach to Nea Anchiallo, 190 miles northeast of Athens.

Mount Othris, 5,663 feet high, is near the final approach for aircraft attempting an instrument landing at the military airport, the sources said, adding that visibility was poor. Heavy snowfalls and rain have plagued Greece the past four days.