Russian Foreign Minister Sergei Lavrov and U.S. Secretary of State Hillary Clinton will meet international Syria mediator Lakhdar Brahimi in Dublin on Thursday, Dec 6, to try to put a UN peace process for Syria back on track, Reuters reported citing diplomatic sources.

The talks come ahead of a meeting of the Western-backed "Friends of Syria" group in Marrakech next week which is expected to boost support for rebels fighting to overthrow Syrian President Bashar al-Assad.

"They will speak about a plan (or) common understanding on how to move forward," one source said of Thursday's meeting, which will take place on the sidelines of an Organization for Security and Cooperation in Europe (OSCE) gathering.

A senior U.S. State Department official confirmed Clinton had accepted Brahimi's invitation to the afternoon meeting.