Iraqi security forces say a car bomb exploded at a market in northern Diyala province Friday, killing at least 23 people.
Officials say the blast occurred in the town of Khalis and injured more than 50 people.
In late March, at least 42 people were killed in twin bombings near a restaurant in Khalis.
The explosions occurred shortly before Iraqi officials announced full preliminary results from the March 7 parliamentary election.
Election officials say former Prime Minister Ayad Allawi's bloc won 91 seats, the most of any political group. Prime Minister Nouri al-Maliki's coalition won 89. Neither party had the majority needed to form a government.
Some information for this report was provided by AP, AFP and Reuters.