Another UN-Russia-US trilateral meeting will be held on Dec. 20 to prepare for Geneva II international conference on Syria, which is scheduled for January 22, said UN-Arab League Joint Special Representative for Syria Lakhdar Brahimi on Monday.

Brahimi made the remarks at a press conference after a trilateral meeting was held here Monday morning.

He said that the list of participants to the so-called Geneva II talks is still under discussion.

"We are still discussing the complete list of participants," Brahimi told reporters, saying that Iran and Saudi Arabia will be "among the possible participants."

"We are in touch both with the government and with the opposition (of Syria). We are asking them to name their delegations as early as possible, hopefully before the end of the year," he said.

Asked whether the opposition will be represented by the Syrian National Coalition (SNC), Brahimi said that SNC will play a very important role in forming the delegation, while stressed that the delegation has to be "credible and representative, as representative as possible."

Brahimi said that not all the people who want to come to Geneva will be able to come.

"They should know this is not an event, this is a process, and in this process, I am sure that everybody who wants to participate in rebuilding what I call the new republic of Syria will be able to do so in the course of the process," he said.

UN Secretary-General Ban Ki-moon announced earlier Monday that the Geneva II conference will be held on Jan. 22. The conference will bring the Syrian government and opposition to the negotiating table for the first time since the start of the Syrian conflict.

Ban said that the goal of the conference is the full implementation of the Geneva Communique of June 30, 2012, which was reached after the Action Group meeting on Syria held in Geneva in June 2012, and included the establishment, based on mutual consent, of a transitional governing body in the war-torn country.