"Boeing stands ready to provide whatever assistance is requested by authorities," the Seattle-based company said in a statement on its website.
"Our thoughts and prayers are with those on board the Malaysia Airlines airplane lost over Ukrainian airspace, as well as their families and loved ones," it said amid reports that all 295 people on board the Boeing 777 plane died in the crash when the aircraft was shot down by "terrorists" in war-torn Ukraine.
IN PICS: The DEADLIEST air disasters in history
IN PICS: The DEADLIEST air disasters in history
In PHOTOS: Ukraine VS pro-Russian separatist fighters
Malaysia plane was shot down, says Ukraine
PHOTOS: Malaysia Airlines flight crashes in Ukraine, 295 killed