
Security and medical sources said both incidents took place in the northern province of Salahuddin on Sunday.
In the first incident, a group of militants attacked a police station near a stadium in the town of Tuz Khormato, shooting dead six policemen.
In the town of Baiji, Iraqi security forces found the decapitated heads of three men in a market during the early hours of Sunday.
The men, including an anti-Qaeda leader, were kidnapped on February 6 near the provincial capital city of Tikrit.
Fatal bombings and shooting attacks continue to claim more lives in Iraq.
On February 7, over a dozen people were killed in such attacks that hit northern Iraq as well as the capital, Baghdad.
The attackers in Iraq often target crowded places, including markets, caf�s and mosques, in an attempt to cause maximum fatalities.
According to figures compiled by Iraq�s ministries of health, interior and defense, some 1,013 people were killed in January alone, making it the deadliest month since April 2008.
Iraqi Prime Minister Nouri al-Maliki says al-Qaeda terrorist group is behind the killing of thousands of people in his country.
The premier blames the group for �destroying the houses of citizens and killing them, and blowing up government departments.�
By Press TV
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