Munich airport spokesman Peter Pruemm said the plane belonged to Greece's Olympic Airlines, and that "the pilot apparently said there was a bomb threat." He said the plane had 137 people on board.
Greek police said a bomb threat had been made to police headquarters, but that the flight number given in the threat did not exist. The plane that landed in Munich had the closest flight number.
"We have informed our consular authorities in Munich, which ... sent staff to the airport and are cooperating with German authorities," Greek Foreign Ministry spokesman Giorgos Koumoutsakos told state-run NET television.
"I hope it was a hoax, but we are looking into the issue and we hope to have it cleared up soon," he said.
Giorgos Kassimatis, a passenger on the plane, told NET that "we have landed and everything is fine. There was a bomb threat so that's why we landed in Munich."
The discovery of the submarine has unveiled a few "inconsistencies." For example, how can one explain the fact that the sub was found where it needed to be searched for from the start?