Four people were killed and nine others injured in two bombings and a gunfire attack in the Iraqi capital on Monday morning, an Interior Ministry source said, Xinhua reported.
Two roadside bombs which targeted the Iraqi police detonated coordinately in central Baghdad, the source told Xinhua on condition of anonymity.
The first blast went off near a popular restaurant in the industrial district of al-Shiekh Omer in downtown Baghdad, damaging parts of the restaurant and several nearby shops and buildings, the source said.
Minutes later, the second blast ripped through the area when a police patrol arrived in the scene and destroyed a police vehicle, killing two policemen and wounding four others aboard, the source added.
In a separate incident, unknown gunmen stormed an apartment in Baghdad's southern district of Doura, killing two women and wounding four others, he said.
Iraqi security forces cordoned off the scene and started an investigation into the incident, he added.
Meanwhile, a sticky bomb attached to a civilian car went off near the Babylon Hotel in Baghdad, wounding the driver, the source said.
Sporadic attacks are still common in Iraqi cities more than three months after the country held its landmark parliamentary election which is widely expected to shape the political landscape of the war-torn country.