Leaders of Lebanon's U.S.-backed government and the Hezbollah-led opposition met behind closed doors in Qatar on Saturday for the highest-level talks so far in the country's 18-month-long political crisis, which turned violent a week ago.

The Doha-hosted meeting on forming a national unity government and electing a president was agreed under a deal, mediated by the Arab League, to end Lebanon's worst violence since the 1975-1990 civil war.

But the government raised the stakes on the talks Saturday, insisting they must also tackle the issue of the weapons used by the Iranian-backed militant Hezbollah, which the U.S. considers a terrorist group.

Telecommunications Minister Marwan Hamadeh told The Associated Press from Qatar that leaders would discuss "Hezbollah's use of its weapons to achieve internal political aims" in the wake of recent violence.

Hamadeh said he expects "three critical days" before the sides reach any sort of compromise on the standoff that has pushed Lebanon to the brink of an all-out conflict.

Lebanon's crisis has paralyzed the country and left it without a president since Emile Lahoud's term ended last November.

A week ago, the standoff dissolved into violence when the government passed measures to rein in Hezbollah, whose fighters then responded by overrunning neighborhoods of west Beirut in clashes that left 67 people dead and more than 200 wounded.

The violence eventually forced the government to revoke the measures. The move was a major victory for Hezbollah and indicated that the militant group had gained the upper hand in the power struggle.

The feuding Lebanese factions arrived in Qatar Friday, where Emir Sheikh Hamad Bin Khalifa Al-Thani welcomed them saying he hoped the Lebanese would come to an agreement and prevent further clashes in their country.

Hardline Christian pro-government politician Samir Geagea warned Hezbollah that the talks would fail if the group sticks to keeping its arsenal in defiance of state authority. "We can no longer accept Hezbollah as it is," Geagea told the Qatari-based pan Arab Al-Jazeera television.

The opposition, represented by Parliament Speaker Nabih Berri and three Hezbollah lawmakers, had no immediate comments. Continued...