A former Syrian political prisoner with close links to Saudi Arabia was picked Saturday to lead Syria’s main Western-backed opposition group, filling a long vacant post caused by divisions among President Bashar Assad’s opponents.

Inside Syria, government troops advanced into rebel-held areas of the central city of Homs, pushing into a heavily contested neighborhood after pummeling it with artillery that drove out opposition fighters, an activist said.

The election of Ahmad al-Jarba as the head of the Syrian National Coalition came during a meeting in Turkey in what was the second attempt in recent months by Assad’s opponents to unify their ranks.

The opposition bloc is primarily composed of exiled politicians with little support among Syrians back home who are trying to survive the third summer of conflict that has killed more than 93,000 people and forced millions to flee their homes.

Al-Jarba’s election suggests the opposition is trying to unite despite its differences after Assad’s forces gained ground last month in and around the strategic town of Qusair near the border with Lebanon.

It also underscored the rivalry between Saudi Arabia and Qatar who are vying for influence among the Sunni-dominated Syrian opposition. Both have been prominent backers of forces struggling to oust Assad.

The Saudi-backed al-Jarba won 55 votes, edging out Qatar-endorsed businessman Mustafa Sabbagh who got 52 votes, according to a statement from the 114-member SNC in Istanbul, where many of Syrian opposition figures are based. The SNC statement did not say who the remaining members voted for.

Al-Jarba, a 44-year-old lawyer with a law degree from Beirut’s Arab University, is from Syria’s northeastern province of Hassakeh and is a member of the powerful Shammar tribe that extends into Iraq. He was a little-known anti-Assad figure before Syria’s civil war though he was detained in March 2011 — days after the uprising against Assad began. It was his second arrest, following one in 1996 when he was held for two years because of anti-government activities.

After his release, al-Jarba left Syria in August in 2011 and became active in the opposition. He is close to secular politician Michel Kilo’s Democratic Bloc, which recently joined the SNC. Al-Jarba could not be immediately reached for comment after his election Saturday.

An SNC statement quoted him as saying that his priorities will be “to follow-up on the situation inside Syria, especially in Homs,” and that “all efforts should be in this direction.”

But even with al-Jarba’s election, it is unclear if the SNC can overcome deep divisions among its politicians.

Also, the council has in many ways become irrelevant to rebels battling regime troops in Syria, despite its appointment in March of Ghassan Hitto as head of an interim government meant to administer areas seized by the rebels. So far, Hitto has not formed a Cabinet.

The vote in Turkey came as the U.S. and Russia hope to bring the warring sides in Syria together at an international conference in Geneva. The SNC said recently it will not attend the Geneva talks unless they are about Assad handing over power.