A car bomb attack south of the Iraqi capital has killed at least 10 people, while the death toll from a series of coordinated blasts Thursday north of Baghdad has risen to nearly 100.

In Friday's attack, police say a bomb blast tore through a crowded market in the mainly Shi'ite city of Hillah. More than 40 other people were injured in the explosion.

Meanwhile, hospital officials said the death toll from three nearly simultaneous car bomb attacks Thursday in the northern city of Balad had risen to 99. Al-Qaida in Iraq claimed responsibility for that attack in an unverifiable Internet statement.

The group, which is led by Abu Musab al-Zarqawi, has declared war on the country's majority Shi'ites, ahead of the October 15 constitutional referendum.

Some information for this report provided by AP, and AFP .