Beirut: The son of former premier Rafik Hariri marked the anniversary of his father's assassination on Thursday by urging the Syria-backed opposition to join a unity government to end a crisis that has paralysed Lebanon.

Supporters of Sa'ad Hariri anti-Damascus governing coalition poured into Martyrs Square to mark the killing of Hariri three years ago which led to Syria's military withdrawal from Lebanon and to the crisis which divides the Lebanese.

"Our hand is extended and will remain extended, no matter what the difficulties," Hariri told the crowd in a message to the opposition, which is led by the powerful Damascus-backed Hezbollah.

The governing coalition accuses Syria of killing Hariri and other anti-Syrian figures assassinated since his death. Syria denies any involvement.

Speaking at the funeral of assassinated Hezbollah military commander Imad Moughniyah, Hezbollah leader Saeed Hassan Nasrallah said: "When we see that the extended hand is sincere, it will only be met by an extended hand."

The opposition and governing coalition have been locked in a power struggle for 15 months that has paralysed government, left the country without a president since November and led to the worst street violence since the 1975-90 civil war. Both sides have agreed on General Michel Sulaiman as the nominee for president. But his election by parliament has been postponed by a dispute over the division of seats in the new cabinet. Addressing the opposition, Hariri said: "We call on you to elect General Michel Sulaiman president of the republic now and not tomorrow so that we can sit together in a government of national unity."

Waving Lebanese flags, governing coalition supporters held aloft pictures of Hariri and the other anti-Syrian figures assassinated since the February 14, 2005 suicide truck bombing that killed the former prime minister and 22 others.

A bronze statue of Hariri was unveiled at the site of the blast on the Beirut seafront.

"Syrian Killing Regime Enough" read one placard, accusing Syria of the killings. "Justice is coming" read the slogan above a picture of Syrian President Bashar Al Assad.

The UN Security Council voted last year to set up an international tribunal to try suspects in the killings.

"The truth is coming," Hariri said, addressing the crowd estimated at more than a million by Interior Minister Hassan Al Sabaa. Others put the crowd, which gathered under a stormy Beirut sky, in the tens of thousands.

Hariri's assassination triggered international pressure that forced Syria to end a 29-year military presence in Lebanon.