Shootings and bombings in Baghdad and north of the capital killed five people, including a police captain, on Wednesday, security and medical officials said.

In the capital's east, a roadside bomb at a vegetable market killed one person and wounded six others.

Also in east Baghdad, a truck driver was shot dead by gunmen, but it was not immediately clear why the man was targeted.

In Muqdadiyah, northeast of Baghdad in restive Diyala province, two Shiite civilians were shot dead in separate incidents by gunmen using silenced weapons.

And in the main northern city of Mosul, gunmen killed a police captain and wounded his 17-year-old son, who was nearby at the time of the attack.

All the officials spoke on condition of anonymity.

Violence in Iraq is dramatically lower than at its peak in 2006 and 2007, but attacks remain common, especially in Baghdad and north of the capital.