Militants accidentally set off their own car bomb Monday at a training camp in the countryside north of Baghdad, leaving 21 dead and resulting in two dozen arrests, Iraqi officials said.
A police officer said the militants were attending a lesson on making car bombs and explosive belts when a glitch set off one of the devices.
The officer said security forces rushed to the area after hearing the sound of the explosion. They arrested 12 wounded suspected militants plus another 10 trying to flee the area.
Security forces found seven car bombs, several explosive belts and roadside bombs after searching two houses and a garage in the orchard, he said.
Medical officials confirmed the casualties. All officials spoke anonymously because they were not authorized to speak to media.
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