A man stands next to wreckage from Malaysia Airlines Flight 17 near Torez, Ukraine, on Thursday, July 17.
Ukraine spy chief: Russian downed MH17
01:33 - Source: CNN

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Kiev, Ukraine CNN  — 

Did a Russian fire the missile that downed Malaysia Airlines Flight 17? That depends on who you ask.

A top Ukrainian official says he has no doubt.

Vitaly Nayda, Ukraine’s director of informational security, told CNN the person who shot down the flight was “absolutely” a Russian. “A Russian-trained, well-equipped, well-educated officer … pushed that button deliberately,” he said.

“We taped conversations” between a Russian officer and his office in Moscow, Nayda said. “We know for sure that several minutes before the missile was launched, there was a report” to a Russian officer that the plane was coming, he said.

“They knew the plane was coming with constant speed, in constant direction,” and should have known it was not a fighter jet but “a big civilian plane,” he said.

U.S. officials say pro-Russian rebels were responsible for shooting down Malaysia Airlines Flight 17, but they now believe it’s likely the rebels didn’t know the plane was a commercial airliner when they opened fire, U.S. intelligence officials said Tuesday.