After several weeks of minor skirmishes Hostile_encounter , Dutch-led troops assaulted Attack Chinese strongholds in sugar mills throughout the area .

The responsibility for investigation Criminal_investigation was delegated to the Dutch Safety Board ( DSB ) and the Dutch-led joint Collaboration investigation Criminal_investigation team ( JIT ) , who concluded Coming_to_believe that the airliner was downed Motion by a Buk surface-to-air missile launched from pro-Russian separatist-controlled territory in Ukraine .