Russian Foreign Minister Sergey Lavrov warns that his country could take "political and military" decisions if the Daesh Takfiri terrorists were redeployed to eastern Syria after being granted a safe passage from Mosul.

“As far as I know, the city is not fully encircled. I hope it’s because they simply couldn’t do it, not because they wouldn’t do it. But this corridor poses a risk that Islamic State [Daesh] fighters could flee from Mosul and go to Syria,” Lavrov said on Tuesday.

“We will be evaluating the situation and take decisions of both political and military nature if this happens,” he added. “I hope the US-led coalition, which is actively engaged in the operation to take Mosul, will take it into account.”

Iraqi government troops, together with Sunni fighters and Shia forces from Popular Mobilization Units, and Kurdish Peshmerga fighters, are involved in a massive offensive to liberate Mosul, the last major Daesh stronghold in Iraq.

Iraqi forces hold a position on October 17, 2016 in the area of al-Shurah, some 45 km south of Mosul, as they advance towards the city to retake it from the Daesh terrorist group. (Photo by AFP)

The Iraqi premier announced the start of the operations to liberate Mosul from Daesh terrorists on Sunday. The city fell to the Takfiri Daesh terrorists in June 2014 shortly after they unleashed a campaign of terror and destruction in the northern and western parts of Iraq.

Earlier, Russia's RIA Novosti news agency quoted an unnamed diplomatic source as saying that the US and Saudi Arabia had agreed to grant Daesh terrorists free passage from Iraq’s Mosul on the condition that they relocated to the eastern regions of Syria.

The source said the plan aimed "to discredit the success of the Russian Air Force. And, of course, it’s an attempt to undermine Syrian President (Bashar) al-Assad.”

Russia has been conducting airstrikes against Daesh and other terrorist groups in Syria since September 30 upon a request from the government of President Assad. Since then, it has killed hundreds of terrorists.