"I don't see any differences from the tragedy [of] 9/11, from the tragedy of Lockerbie, and from the tragedy of Grabavo on the Ukranian sky," Petro Poroshenko said Monday in an interview with CNN's Christiane Amanpour, Censor.NET reports citing Politico.
"At every tragedy, we should demonstrate the same way of reaction: this is a danger for the whole world, this is a danger for the global security," he said.
Poroshenko said that pro-Russian separatists have repeatedly blocked investigators from the crash site.
"The separatists are removing evidence from the crash site. All of which begs the question, what exactly are they trying to hide?" Obama said.
Obama continued, "Moreover, these Russian-backed separatists are removing bodies from the crash site. Oftentimes without the care that we would normally expect from a tragedy like this. This is an insult to those who have lost loved ones. This is the kind of behavior that has no place in the community of nations."
The Ukrainian president also called the treatment of victims' bodies another crime in addition to the crash itself, which he called a terrorist attack.
"It is a disaster - the way how the bodies, the innocent bodies, including the 80 children, were treated," Poroshenko said, telling CNN that personal belongings of the victims have been taken.
"This is barbarian style of doing this with the bodies of victims," he said, adding that a train carrying the remains has been blocked from leaving the region from pro-Russian separatists.
Poroshenko, stated that the separatists who control the territory at the site of the crash have tried to destroy evidence, but said those efforts are "impossible."
"Because we have all the strong evidence," Poroshenko said. "We know exactly the place [the surface-to-air missile was] launched, we know exactly the pace where it hit the civilian plane, the place where the plane crashed."
Poroshenko also pushed back at calling the group responsible for the crash "separatists," instead repeatedly calling them terrorists adding that Ukraine has evidence that they are supported by Russia - sentiments that Obama repeated during his statement Monday.
"Russia has extraordinary influence over these separatists - no one denies that. Russia has urged them on, Russia has trained them, we know Russia has armed them … key separatists leaders are Russia leaders," Obama said, calling upon Russia and Russian President Vladimir Putin to compel the separatists to cooperate with the investigation.
"The burden now is on Russia to insist that the separatist stop tampering with the evidence, grant investigators, who are already on the ground, immediate, full and unimpeded access to the crash site," Obama said.
The Ukrainian president called upon the Congress to follow Ukrainian court to recognize the separatists in the Lugansk and Donetsk regions as a terrorist organization.
"I hope that the United States, together with the United States Congress and Senate make the same decision to recognize this terrorist as a [terrorist] organization," Poroshenko said. "That is the very important gesture of solidarity we are waiting [for] from the whole world, together with the victims."