Baghdad- At least six people were killed and 17 injured Monday, including four women from the same family, in triple attacks in Baghdad and the restive Diyala province, according to security officials.

A car bomb, targeting an Iraqi police checkpoint near a shopping centre in Baghdad's district of Karada, killed five people, including one policeman, and injured 10, police sources told Deutsche Presse- Agentur dpa.

Baghdad has seen a wave of attacks by car bombs in the past two days after a relative period of calm that has seen a decrease in violence in recent months.

In the restive Diyala province in central Iraq, two bombings left one person dead and seven people injured, the Voices of Iraq news agency cited a police source as saying.

Mortar shells fell on a residential building in the village of Sanija near Baquba, 57 kilometres north-east of Baghdad.

One man was killed and three people from the same family were injured, according to the source.

In the second attack, a bomb went off near a farmland in the village of Muradiyah near Baquba, injuring four women from the same family.

Diyala is a hotbed of Sunni extremist insurgents from the Islamic State of Iraq, which has links to the al-Qaeda terrorist network. dpa