Attacks in Iraq on Sunday killed at least six people, among them a police brigadier general and two soldiers, security and medical officials said.

Gunmen using silenced weapons opened fire on a vehicle carrying police Brigadier General Nayef Abdul Razzaq, head of the interior ministry's complaints office, in the Al-Yarmuk area of west Baghdad, killing him and his driver, an interior ministry official said.

A medical source at Al-Yarmuk hospital said the facility received the body of the driver, while Razzaq died within minutes of arriving.

In Sadr City in north Baghdad, a magnetic "sticky bomb" attached to a minibus killed two people and wounded six, the interior ministry official said, while a medical source put the toll at three dead and eight wounded.

And in the northern Iraq city of Mosul, a roadside bomb killed two soldiers when it exploded near their patrol, army First Lieutenant Walid Hammoud and Dr Mahmud Haddad said.

The latest violence brings the number of people killed this month to at least 175, while more than 670 have been wounded in attacks, according to an AFP tally based on security and medical sources.

Violence in Iraq is down from its peak in 2006 and 2007, but deadly attacks still occur almost every day.