Syria's foreign minister says his country is working with Saudi Arabia to help ease tension in Lebanon .
Syria and Saudi Arabia were once bitter rivals but recently have made an unprecedented show of cooperation to stave off an eruption of violence from the investigation into the 2005 assassination of Rafik Hariri.
Hariri was a former prime minister whose killing set off a wave of turmoil in the Middle East. Many fear there could be violence if a UN tribunal investigating the case indicts members of the militant Hezbollah group.
Saudi Arabia was a strong backer of Hariri, a prominent Sunni Muslim politician while the Shiite Hezbollah had a strong ally of Syria.
Syrian Foreign Minister Walid al-Moallem said Wednesday that Syria and Saudi Arabia want a stable Lebanon.