• Syrians walk towards the Turkish border at the Bab al-Salam border gate, Syria (AAP)
A ceasefire between warring Syrian parties could go into effect on Saturday, although strikes against Islamic State would be able to continue.
23 Feb 2016 - 5:52 AM  UPDATED 23 Feb 2016 - 8:06 PM

The United States and Russia have announced plans for a cessation of hostilities in Syria that would take effect on Saturday, but exclude militants from the Islamic State, Nusra Front and others the United Nations deems as terrorist groups.

Parties would indicate their agreement to the United States and Russia by noon on Friday Damascus time, and the truce would go into effect at midnight, the two countries said in a joint statement issued by the US State Department.

Under the terms of the deal, Syrian government and allied forces will cease attacks against armed opposition forces, and vice versa, with any weapons including rockets, mortars, anti-tank guided missiles.

However, the US-Russian plan leaves a loophole by allowing continued attacks, including air strikes, against Islamic State, Nusra and other militants.

Syria bombings claimed by IS kill at least 140
More than 140 people have been killed in a series of bomb blasts in government-held areas of Homs and near the Syrian capital Damascus.

Because of the mingling of forces, this could result in continued attacks against armed opposition members who are parties to the cessation of hostilities.

"Military actions, including air strikes, of the Armed Forces of the Syrian Arab Republic, the Russian Armed Forces, and the US-led Counter ISIL Coalition will continue against ISIL, 'Jabhat al-Nusra' (Nusra Front) and other terrorist organizations designated by the UN Security Council," the joint statement on Monday said.

It added that Russia, the United States and others would work together to delineate the territory held by Islamic State, Nusra Front and other groups deemed terrorists by the UN Security Council, which are excluded from the truce.

Talks with Russians on Syria serious, constructive: Kerry
The US is in talks with Russia on a ceasefire in Syria, but US Secretary of State John Kerry says there is still 'a lot more work to do'.