The main Syrian opposition coalition said Sunday the delegation representing the opposition in the Geneva II conference would comprise all factions in and outside Syria.
"There is a tendency inside the coalition that most members of the delegations should be from outside the coalition," Fayez Sara, a political adviser to coalition leader Ahmad Jarba, told Anadolu Agency via phone.
"We do not monopolize the opposition as some people like to propagate," he said.
On Saturday, UN and Arab League Special Envoy to Syria Lakhdar Brahimi urged the Syrian opposition to submit the names of its delegation to Geneva II no later than December 27.
Sara said that the coalition's decision to attend the conference would not be affected by an invitation for Iran to attend.
"To us, Iran is an enemy, just like the regime of Bashar al-Assad," he asserted.
"If we are going to negotiate with the regime, why should not Iran attend?" Sara noted. "The regime and Iran are two sides of the same coin."
"We would not sit down with Iran directly during or after the conference," insisted the opposition official.
Geneva II, which will aim to find a political solution to the conflict in Syria, had initially been planned for late May, after having first been proposed at a Moscow meeting between US Secretary of State John Kerry and Russian counterpart Sergei Lavrov.
Amid heated disagreements as to who should have seats at the table, however, the event was subsequently postponed.
Syria has been in the throes of conflict since 2011 when a peaceful uprising against Assad escalated into a civil war following a violent government crackdown.
According to the UN, more than 100,000 people have been killed in the conflict so far.
A garrison loyal to President Abedrabbo Mansour Hadi has held out in the city largely surrounded by the Huthi rebels and their allies who control the capital Sanaa and much of the north.
The building, dating from the early 1960s and including a shopping centre and clothing workshops, had been evacuated, but firefighters were battling the blaze inside and it was not immediately clear if there were casualties.
Turkish army hits 182 ISIL targets in northern Syria, says General Staff
Russian foreign minister says invitation enables participation of all those who mentioned in public statements
Defendants charged with involvement in two high-profile assassination attempts last year, judicial source says
Strikes 'were a result of continued coordination with Turkey', U.S.-led coalition says
At the Paris conference, some 70 countries affirmed their support for a two-state solution that would see a state of Palestine co-existing alongside Israel.
UN envoy Nickolay Mladenov delivered the warning to the Security Council, which met for the first time since the adoption of a contentious resolution demanding an end to Israeli settlements.
Suspect is believed to have recruited suicide bombers for notorious extremist group
Iraqi officials slammed Bahrain’s execution on Sunday of three men convicted of killing policemen two years ago
116 ISIL targets also destroyed as part of Turkish-led Operation Euphrates Shield
3 others wounded in attack on security checkpoint, health ministry says
Army launched wide-ranging campaign last month aimed at recapturing parts of Yemen’s southern Shabwah province
Aid campaign run by Turkish Red Crescent draws large attention at home and abroad
OPEC and non-OPEC oil producing countries agreed to cap production from January 1 to end a global glut that has hammered prices, but doubts remain about implementation before data is released at the end of the month.
The government of President Abdel Fattah al-Sisi had appealed against a lower court ruling in June that found the controversial border demarcation agreement was illegal.