At least 11 people were killed when a homicide bomber blew himself up north of Baghdad on Tuesday, police said.

A man entered a popular cafe in Abbara village, about 70 kilometers (45 miles) north of Baghdad, a police officer said on condition of anonymity as he was not authorized to speak to the media.

In addition to those killed, at least 18 others were wounded as they sipped on soda and tea when the bomber struck shortly after 7 p.m. local time.

Just 10 kilometers (six miles) south in central Baqouba, a homicide bomber drove a car packed with explosives into a police checkpoint, killing two and wounding 15 others, police said.

Both attacks took place in turbulent Diyala province, which despite the nationwide decrease in violence of nearly 60 percent in the last six months, has seen insurgent activity continue.

In central Baghdad, a parked car bomb targeting a police patrol went off, killing four people and wounding seven others, police said.

A officer speaking on condition of anonymity because he was not authorized to speak to the press said two police officers and two civilians were among those killed.