At least 62 people were killed and 139 others wounded in a wave of violent attacks across Iraq on Thursday, police sources said.

An Iraqi policeman examines the site of blast in Tuz-Khurmato, northern Iraq, July 11, 2013. At least 62 people were killed and 139 others wounded in a wave of violent attacks across Iraq on Thursday, police sources said.

Unidentified gunmen opened fire on Iraqi security forces guarding oil facilities on the road between Haditha and Baiji in northern Iraq, killing 11 soldiers, a police source told Xinhua on condition of anonymity.

A car bombing and subsequently a suicide bomber attacked a funeral in Muqdadiya, some 90 km northeast of Baghdad, killing 10 people and injuring 32 others, the source said.

Also, at least 10 people were killed and 18 others wounded in two car bomb attacks near a coffee shop in Yathrib, some 85 km north of Baghdad, another police source told Xinhua.

In Tikrik, some 140 km northwest of Baghdad, three soldiers were killed and 10 others wounded, including an officer, when a car bomb struck a military convoy.

Also in the day, a series of other violent attacks, mainly targeting the police forces in Iraq, killed 28 people and wounded some 79 others in the western province of Anbar and northern provinces of Salah ad-Din, Kirkuk and Nineveh, the police said.

No group has so far claimed responsibility for the attacks, but the al-Qaida front in Iraq, in most cases, is responsible for such violent acts in the country.

High-profile bomb attacks are still common in Iraq despite the dramatic decrease since their peak in 2006 and 2007, when the country was engulfed in sectarian killings.