US President Barack Obama arrived in Russia’s Saint Petersburg for the G20 summit, where officials said he will argue his case for military action against the Syrian regime over an alleged chemical weapons attack.

Syrian Foreign Minister Walid Muallem will visit Moscow on September 9 to meet with his Russian counterpart Sergei Lavrov, RIA Novosti reported on Thursday with reference to Russian Foreign Ministry.

Three Russian warships crossed Turkey’s Bosphorus Strait Thursday en route to the eastern Mediterranean, near the Syrian coast, amid concern in the region over potential US-led strikes in response to the Damascus regime’s alleged use of chemical weapons.