Iraqi officials say an attack on an election campaign meeting in the city of Baquba has killed at least 20 people.
Police say a militant threw a hand grenade into the meeting Saturday, before a suicide bomber blew himself up. More than 50 people were wounded.
The meeting was for supporters of a candidate preparing to run in provincial elections later this month.
There was no immediate claim of responsibility.
Saturday's attack in Diyala province is the latest incident in a spike of unrest leading up to the April 20 elections. Elections in the provinces of Anbar and Ninevah have been postponed by several months because of security threats.