From Finnish newspaper: according to a passenger, the plane was forced to land on one main landing gear because the other one fell off We have to remember that rarely newspapers get the facts correct and especially in this kind of early phase.

The open questions is that why the plane landed to VNO if it's destination was PLQ - something must have happened already during the flight.

Okay, another newspaper quotes Tom Christides who tells that during the flight there was a problem detected in one of the landing gears and crew decided to land to VNO. During the landing, one of the landing gears collapsed. No fire this time.