"We know at least one American citizen, Quinn Lucas Schansman, was killed," Obama said in a statement from the White House briefing room."Our thoughts and prayers are with his family for this terrible loss."
Obama said that at this point, Schansman was the only passenger on the plane that he could identify as a U.S. or dual citizen. He called the deaths of all the victims, who he said had nothing to do with the crisis in Ukraine, an "outrage of unspeakable proportions."
"This was a global tragedy," he added. "An Asian airliner was destroyed in European skies filled with citizens from many countries, So there has to be a credible international investigation into what happened."
Obama said evidence indicates that the commercial jet was shot down by a surface-to-air missile launched from a rebel-controlled area of Ukraine. He called for an immediate cease-fire between Ukraine and pro-Russian forces in order to facilitate a clean investigation and further cautioned against misinformation and speculation as investigators sort out the facts surrounding the crash.
"No one can deny the truth that is revealed in the awful images we all have seen," he said. "And the eyes of the world are on eastern Ukraine, and we are going to make sure that the truth is out."
This post has been updated.