Malaysia, July 18 (ANI): Malaysian Prime Minister Najib Razak demanded swift justice for those responsible if the Malaysian airliner that came down in Ukraine was found to have been shot down. Razak on Friday said Malaysia had not been able to verify what caused the Boeing 777-200 to crash while on a flight from Amsterdam to the Malaysian capital, Kuala Lumpur, but it had not made a distress call. But he said he had agreed in talks with US President Barack Obama that investigators must get full access to the site of the crash. Ukraine accused "terrorists" - militants fighting to unite eastern Ukraine with Russia - of shooting down the plane. The rebels denied responsibility.