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.

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