President Obama called Ukrainian President Petro Poroshenko and Malaysian Prime Minister Najib Razak about the downed Malaysia Airlines jetliner. Mr Obama is said to have placed the calls from Air Force One during a flight from Delaware to New York.
Malaysia's Defence Minister posted a picture of the country's prime minister speaking to Mr Obama.
MH17 : If indeed our plane was brought down, those responsible WILL be brought to justice!
Thousands of online users have taken to social media to call for the victims of the Malaysian airliner crash to be returned to loved ones.
United States intelligence officials admitted that they do not know who fired the surface-to-air missile that downed flight MH17.
Warning this article contains images that some may find distressing