At least 30 people were killed today when a suicide bomber strapped with explosives blew himself up in a crowd of Iraqi military recruits at an army base in the northern town of Tal Afar, police said.
Police chief Najim Abdullah said at least 35 people were wounded in today's explosion, which occurred one day after a suicide car bomb blew up in a crowded Tal Afar market, killing at least 24 people and wounding 36.
A boy who was wounded in a suicide bombing in Tal Afar lies in a hospital in Mosul today
Sunni Arab insurgents have waged a campaign of car bombings, suicide attacks and kidnappings in recent months in an attempt to destabilise the Shi'ite- and Kurdish-led government and derail the US-backed peace process.
Violence has spiked in the past two weeks ahead of a national referendum on Saturday on a new constitution for Iraq which some Sunni militants say will permanently sideline them in favour of the country's Shi'ite majority.
Iraqi leaders in Baghdad announced on Wednesday that parliament would vote on proposed constitutional amendments that have been agreed in hopes of winning broader Sunni support for the charter.
Tal Afar, near the Syrian border, was the focus of major offensive mounted by Iraqi and US forces last month aimed at rooting out militant fighters.