Russian media reported that investigators believe Malaysia Airlines flight MH17 was most likely hit by a surface-to-air missile.
However, a spokesman for the Dutch Public Prosecution Service said Tuesday, it cannot be excluded that the plane was downed by an air-to-air missile.
The spokesman said the Joint Criminal Investigation team is focusing on several scenarios. That MH17 was downed by a ground-to-air missile is the most likely one.
But other scenarios, like the air-to-air scenario, still cannot be excluded.
He noted that the criminal investigation of the crash is very complex. The crash site was long inaccessible to investigators. Furthermore, the investigation has to be conducted in a conflict zone.
Malaysia Airlines flight MH17 crashed in eastern Ukraine on July 17 last year on its way from Amsterdam to Kuala Lumpur. All 298 people on board died.
The Dutch Safety Board was tasked with leading the inquiry into the incident. Later that year, it released a preliminary report on the crash, suggesting that the plane had broken up in mid-air after being hit by a number of high-energy external objects.
A final report is expected in October this year.