According to the Qatari Al Jazeera news channel the Syrian National Coalition are expected to make the appeal from Turkey on Saturday.

The news come as the US is carrying out air strikes on ISIL positions on Iraq and a day after the UN Security Council unanimously adopted a resolution that aims to weaken the ISIL and al-Nusra Front, al-Qaeda's Syria branch.

Another member of the coalition told Al Jazeera that the group was "getting different promises" from the US.

The ISIL, an al-Qaeda splinter group, has in the recent months seized swaths of territory in Iraq and Syria and declared a caliphate.

In Syria, the group enforced its rule in the province of Raqqa and other eastern parts of the country through conducting public executions and imposing strict social codes that have many residents living in fear while others have been forced to flee their homes.

Activists who stood up against the rule of the ISIL have been met by a brutal crackdown.

US suggestion to the Syrian opposition doesn’t say anything about the al-Nusra Front which is the official branch of al-Qaeda and has been recorded with the similar acts of violence and extremism during the foreign-charged war in the Arab country.

Syria sank into war in March 2011 when pro-reform protests turned into a massive insurgency following the intervention of Western and regional states.

The unrest, which took in terrorist groups from across Europe, the Middle East and North Africa, has transpired as one of the bloodiest conflicts in recent history.

SHI/SHI