MOSCOW, September 30. /TASS/. Russia will be the sole country that will participate in the operation against the Islamic State in Syria on legal grounds, presidential spokesman Dmitry Peskov has said.

He recalled that such operations were possible only on the basis of a UN Security Council resolution or at the appropriate request of the legal authorities of this or that state concerned. Earlier, the chief of the presidential staff said Syria’s President Bashar Assad had asked Russia to extend military assistance in the struggle against the IS terrorists.

"As a matter of fact Russia will be the sole country that will be carrying out that operation on the legitimate basis at the request of Syria’s legitimate authorities," Peskov said.

The two proper reasons for such operations and strikes are either are resolution by the UN Security Council or the request of the country’s legitimate government. Baghdad had addressed such a request to the international coalition earlier.

The chief of the presidential staff, Sergey Ivanov, earlier on Wednesday said Damascus had addressed Russia with such a request. He pointed out that that was the fundamental distinguishing feature of Russia’s approach and the approach of its Western partners.

"They ignore international law, and we do," he said.

Peskov also said that there were no plans for any special message in connection with the president’s decision to request permission to use Russian armed forces outside the country. He avoided answering the question when the operation in Syria might begin.

"That’s strategic information," he said.

Russian Armed Forces' use abroad authorized by upper house

Russia’s Federation Council earlier on Wednesday unanimously voted for consent to empower the president to use Russian armed forces in Syria.

 Kremlin chief of staff Sergey Ivanov told journalists that Russia will use only its Air Force in Syria against the Islamic State of Iraq and the Levant (ISIL) on Syrian President Bashar Assad’s request.

"In order to observe the international law, one of the two conditions has to be met - either a UN Security Council resolution or a request by a country, on the territory of which an airstrike is delivered, about military assistance," Ivanov told journalists.

"In this respect, I want to inform you that the president of the Syrian Arab Republic has addressed the leadership of our country with a request of military assistance," he added.

"The operation’s military goal is exclusively air support of the Syrian armed forces in their fight against ISIL," he said.

This operation by the Russian Air Force is limited in time and the types of the used weapons are not disclosed, Ivanov added.

Ivanov noted that Russia’s partners will be informed today about the decision to use Russian Air Force in Syria.