The Ukrainian investigation has identified about 100 people responsible in one way or another for the Malaysia Airlines Flight 17 (MH17) downing in the summer of 2014, Ukrainian First Deputy Prosecutor General Dmytro Storozhuk said.

"The investigation has identified about a hundred people related to the tragedy," Storozhuk said at a news briefing in Kyiv on Wednesday.

"We are not saying today who is a suspect or a witness, because the role of each person hasn't yet been determined," he said.