It is highly likely the aircraft was destroyed by 'BUK ' surface-to-air missile . Russian military could have shot it down from a rebel-held area in Donetsk . Investigators say shooters are 'untraceable ' and may have been executed . More than one million documents , videos and photo 's have been looked at . Investigators worried Russian secret service are trying to hack computers . Boeing 777 crashed near Ukraine in Donetsk on July 7 , 2014 and killed 298 .
It is highly likely the aircraft was destroyed by 'BUK ' surface-to-air missile . Russian military could have shot it down from a rebel-held area in Ukraine . Investigators say shooters are 'untraceable ' and may have been executed . More than one million documents , videos and photo 's have been looked at . Investigators worried Russian secret service are trying to hack computers . Boeing 777 crashed near Donetsk in Ukraine on July 7 , 2014 and killed 298 .