Kirkuk, Iraq:
A wave of attacks in Baghdad and north of the capital on Wednesday left at least 23 people dead a day after a Sunni MP was killed in a suicide bombing, amid a worsening political crisis engulfing Iraq.
The latest violence, the deadliest of which targeted Kurdish political party offices in disputed territory in north Iraq, comes with Prime Minister Nuri al-Maliki facing several protests hardening opposition against his rule and calls for his ouster from many of his erstwhile government partners.
No group immediately claimed responsibility for the attacks, which also left more than 200 people wounded, but Sunni militants regularly carry out waves of violence in a bid to destabilise the government and push the country back towards the sectarian violence that blighted it from 2005 to 2008.
Wednesday's deadliest attacks struck the ethnically-mixed city of Kirkuk, 240 kilometres (150 miles) north of Baghdad, where two car bombs in the same neighbourhood killed at least 16 people and wounded 190 others, according to provincial health chief Sadiq Omar Rasul.
"Both explosions inflicted massive destruction," said police Brigadier General Sarhad Qader. "Our forces are still trying to remove corpses from the rubble (of the first attack)."
The first blast was detonated by a suicide attacker and appeared to target a compound housing local offices of the Kurdistan Democratic Party (KDP) of Kurdish regional president Massud Barzani.
A second car bomb parked on the side of a road nearby detonated shortly thereafter, apparently targeting a KDP official.
Qader said six members of Iraq's security forces were killed and 10 others wounded in the two blasts.
Another suicide car bombing in the town of Tuz Khurmatu, also north of Baghdad, killed two people and wounded 34 others. The attack struck near the offices of the Patriotic Union of Kurdistan of Iraqi President Jalal Talabani.
Both Kirkuk and Tuz Khurmatu lie in a tract of disputed territory in north Iraq that Kurdistan wants to incorporate into its autonomous three-province region against the wishes of the central government in Baghdad.
The row is regarded by diplomats and officials as the biggest long-term threat to Iraq's future stability.
In Baghdad three separate attacks left five people dead, officials said.
The latest attacks come a day after the killing of a Sunni Iraqi MP in a suicide attack west of Baghdad, with Ayfan al-Essawi's funeral expected to be held in Fallujah later on Wednesday.
Essawi was a former leader of the Sahwa, a collection of Sunni tribal militias that turned against Al-Qaeda and sided with the US military from late 2006, helping turn the tide of Iraq's bloody insurgency.
Sahwa fighters are regularly targeted for attacks by Sunni militants who view them as traitors.
The violence comes amid a political crisis that has pitted Maliki against several of his ministers just months ahead of key provincial elections.
Weeks of anti-government demonstrations in Sunni Arab majority areas, supported by several parties that are members of Maliki's unity cabinet, have hardened opposition against Maliki, a Shiite.
The crisis comes with barely three months to go before provincial elections, a key barometer of support for Maliki and his opponents ahead of a general election next year.
Violence is down across Iraq since the country's brutal sectarian war, but attacks remain common, especially in Baghdad, Kirkuk and Tuz Khurmatu.