A spate of attacks across Iraq killed seven people on Thursday, including three who died when a suicide car bomber struck as recruits were leaving a military base, officials said.

The attacks come amid Iraq's worst bloodshed since 2008, with more than 4,000 people killed already this year.

Attacks killed 18 people in Iraq Thursday, including six who died in a bombing against a wedding party, the latest in spiraling violence that comes despite wide-ranging operations targeting militants.

Prime Minister Nuri al-Maliki has vowed to press on with the anti-insurgent campaign, which is among the biggest since U.S. forces withdrew in December 2011, but analysts and diplomats say authorities have failed to tackle the root causes of the violence.

Violence in Iraq, including a bombing near a mosque, killed 18 people on Tuesday, officials said, the latest in a spate of unrest that has cost more than 370 lives so far this month.

The bomb near a mosque in Abu Ghraib, west of Baghdad, killed five people and wounded at least 16, officials said.

Suicide bombers killed three people in an attack on Kurdish security forces and a Kurdish political party office in north Iraq on Wednesday, and four people more died in other unrest, officials said.

One suicide bomber driving an explosives-rigged car targeted security forces from Iraq's autonomous Kurdistan region, known as peshmerga, near the north Iraq city of Kirkuk, killing one peshmerga member and wounding 12, police and a medical official said.

A series of car bombs near Shiite mosques targeting worshipers attending weekly prayers killed at least 17 people on Friday, the latest in a spike in unrest ahead of Iraq's first polls since 2010.

The blasts, which also wounded 105 people, struck within an hour of each other in the Baghdad neighborhoods of Binook, Qahira, Zafraniyah and Jihad, as well as in an area of southern Kirkuk city.

A suicide car bomb followed by an assault by grenade-throwing gunmen on a police headquarters in a disputed ethnically mixed city in north Iraq killed 30 people on Sunday.

The vehicle that was detonated in central Kirkuk had been painted to make it look like a police car, and the militants who sought to seize the compound were dressed as policemen, witnesses said.

Car bombs killed four people in Kurdish areas of the disputed northern Iraqi city of Kirkuk on Tuesday, while roadside bombs killed two more in a nearby Arab town, a security official and a doctor said.

The attacks come a day after top security officials from the federal government and Iraq's autonomous Kurdistan region reached an agreement aimed at easing high tensions in disputed areas of northern Iraq, which the country's parliamentary speaker has warned could lead to civil war.

A spate of apparently coordinated attacks across Iraq on the eve of a festival marking the Islamic new year killed 19 people and wounded more than 150 others on Wednesday, officials said.

The 13 bombings and shootings struck in Baghdad and nine other cities, the security and medical officials said, and will likely raise tensions in a country mired in political deadlock and only relatively recently emerged from a brutal sectarian war.

A spate of shootings and bombings targeting Iraqi security forces north of Baghdad killed at least six people and wounded several others on Monday, security and medical officials said.

Among the dead were three policemen and two anti-Qaida militiamen, after deadly bombings targeted Iraqi police the previous night, killing one policeman.

Two bombings targeting security forces in northern Iraq killed two policemen and two soldiers on Sunday evening, security and medical officials said.

In the first attack in the town of Tuz Khurmatu, 175 kilometers (110 miles) north of Baghdad, a roadside bomb targeted an army patrol at around 6:30 pm (1530 GMT).