Ukraine has proof that members of illegal armed groups in southeastern Ukraine possess air defense missile launchers and there are photographs of a missile launch from the area under their control, Ukrainian Prime Minister Arseniy Yatseniuk said.

"We have photographs of a missile launch," the premier said at a press briefing in Kyiv on Monday.

He reaffirmed the Ukrainian army did not use surface-to-air missiles in its operation in the east.

"The Ukrainian Defense Ministry will provide complete information about the whereabouts of all air defense missiles," Yatseniuk said.