Russian negotiator Alexander Lavrentyev made the announcement during talks being held in the Kazakh capital Astana on Tuesday.

"Overall, (the agreement) provides for the presence of Russian military police in the buffer zones, but once again this matter has not been agreed yet…Depending on when the documents on safe zones are signed, I think one should expect concrete measures on the deployment of forces within 2-3 weeks," he said.

"So far it is hard to talk about presence of the Russian observers and representatives of the Russian defense ministry. But nevertheless overall there are plans for the Russian military police presence in the buffer zones. But still this matter has not been fully agreed yet. It will be related to the question about the status of de-escalation monitoring forces," he added.

The final document pertaining to the de-escalation zones are expected to be signed on Wednesday, he added, noting that the principles of the zones have already been agreed upon in the former rounds of the talks.

In May, Russia, Iran and Turkey agreed to establish four "de-escalation zones" in Syria.

Lavrentyev added that Russia and its partners are still engaged in negotiations concerning detailed maps and other conditions related to the Idlib province and southern regions while the borders of two other zones, in Homs province and near Damascus, had been agreed upon.