BAGHDAD -- Thirteen car bombs exploded in three hours yesterday, injuring at least 20 people, while 13 Iraqis were killed in other violence that fed the turmoil following last month's contested parliamentary elections.
Sunni Arabs made their opening bid in negotiations to form a new government. Leaders of the minority's main political group, the Iraqi Accordance Front, traveled to the northern city of Erbil for a meeting today with the president of the Kurdish region.
Sudan, meanwhile, said six kidnapped embassy employees were freed Saturday, a day after Sudan announced it would close its Baghdad mission as demanded by Al Qaeda in Iraq. A Cypriot kidnapped four months ago also was freed after his family paid a $200,000 ransom, a relative said.
A third hostage, a Lebanese engineer kidnapped four days ago, was also released, Lebanon's official National News Agency reported yesterday.
The Kurdish region in Iraq's north already has seen a flurry of post-election bargaining between Kurds and the governing Shi'ite Muslim religious party, the United Iraqi Alliance.
Preliminary results from the Dec. 15 election have given the Shi'ite group a strong lead in the voting for Iraq's 275-member parliament, but not enough for it to govern without other political blocs.
A year ago, it took nearly three months of negotiations between the Shi'ite religious alliance and a coalition of Kurdish parties to form an interim government after a Jan. 30 election that was boycotted by the Sunni Arabs at the core of the insurgency.
The first quarter of 2006 looks more crucial as Iraq tries to shape an administration that will govern for four years. US officials are pushing the parties to form a broad-based coalition government, and failed negotiations could worsen the civil strife.
''This is perceived, inappropriately or inaccurately perhaps, by the enemy as a time of vulnerability, as the government transitions from its transitional government to a permanent government, to the constitutional-based, democratically elected four-year permanent government," said Brigadier General Donald Alston, spokesman for the US-led coalition force.
The Sunni Arab visit to the Kurdish region was the first since the election, whose results have been protested by Sunni and secular Shi'ite parties. Their trip came as Prime Minister Ibrahim al-Jaafari, a leading member of the governing United Iraqi Alliance, met yesterday with Kurdish regional president Mazoud Barzani and discussed the outlines of a future coalition government.
''We agreed on essential principles for exerting efforts to form a broad-based government, a strong national unity government. Meetings will be continued later here and in Baghdad and we will continue to cooperate until we achieve what is beneficial for Iraq," Barzani said.
Final election results are expected as early as this week, and the Shi'ite religious bloc may win about 130 seats -- short of the 184 seats needed to avoid a coalition with other parties to elect a president. That vote is a prerequisite before a government can be formed.
The Kurds could get about 55 seats, the main Sunni Arab groups about 50, and the secular Shi'ite bloc headed by former prime minister Iyad Allawi about 25.
A representative of Allawi's group said it had not been invited to the Erbil talks.
The Erbil meetings took place ahead of today's visit to Iraq by a team of international monitors who will assess the elections, which have been endorsed as credible by the United Nations but denounced as rigged by opposition groups. About 1,500 complaints have been registered.
''We are highly confident that the international team will look deeply into the complaints regarding the election results, will present its recommendations, and compensate us for the votes we lost," Tarek al-Hashimi, head of the Iraqi Islamic Party, told the Al-Jazeera satellite television channel.
Hashimi, who is among the delegation headed to meet with Barzani today, said the Accordance Front would not boycott the next parliament -- a threat that has been made by smaller groups -- and would promote Sunni Arab demands for broad amendments to the constitution approved in an Oct. 15 referendum.
''In the case the results remain as they are, we will remain in the parliament and our message to all will be to amend the constitution," he said.
The day's worst bloodshed occurred in eastern Baghdad, where police said gunmen killed five people at a butcher shop and a bomb killed two police officers at a gas station.
Two more Iraqis were slain and five wounded by gunfire at a Sunni mosque in southern Baghdad, while a Shi'ite sheik was fatally shot at a market in the same part of the city.
In the northern city of Mosul, about a dozen gunmen attacked a police checkpoint, killing a bystander and wounding three policemen, police said.
Eight of the cars bombs exploded in Baghdad and wounded a total of 11 people, police said. Officers later destroyed a ninth car bomb that failed to detonate.
A suicide car bomber near Tikrit injured six civilians, and in the northern city of Kirkuk, a bomb aimed at an Iraqi police convoy wounded three civilians, police said. Car bombings in the northern city of Kirkuk and in Muqdadiyah caused no injuries.