NATO Secretary General Jens Stoltenberg has said once again on Monday that the Alliance will not stop supporting Ukraine.

"NATO offers the strong political and practical support to Ukraine," he said, speaking at the NATO Parliamentary Assembly (PA) in Istanbul.

"We will never recognize the illegal annexation of Crimea, and we continue supporting the territorial integrity and sovereignty of Ukraine," the secretary general said.

"We provide political support for Ukraine, in regard to the Minsk process, and the only way for a peaceful and lasting settlement is a full implementation of the Minsk Agreements," Stoltenberg said.

NATO secretary general once again called on Russia "to stop supporting separatists in eastern Ukraine."

Stoltenberg said that NATO "is constantly looking to see what else can be done for Ukraine."