Police said another car bomb on a busy highway on the northern edge of the Iraqi capital went off, wounding nine people, CNN reported.
The bombings in Baghdad came a day after attacks in Diyala province left at least 10 people dead and 36 people injured.
A car bomb exploded Wednesday near an outdoor market in eastern Baquba, killing three people and wounding nine others, police officials said.
In Muqdadiya, a car bomb exploded near a busy outdoor market, followed by a second blast minutes later after Iraqi security forces arrived to investigate and curiosity-seekers gathered, CNN said. Seven people died and 27 were wounded in those attacks, police said.
Violence in Iraq reached a nearly two-year high in July, with 325 deaths reported, the Interior Ministry said Wednesday. July was the deadliest single month since August 2010, when the death toll reached 426, the ministry said.