At least 91 people have been killed and hundreds injured in a series of car bombs that rocked Baghdad and other Iraqi cities amid Eid al-Fitr celebrations.

Al Jazeera's Imran Khan, reporting from the Iraqi capital, said 50 people had been killed in nine blasts in seven areas of the city on Saturday evening, with targets including cafes, markets and restaurants.

In other attacks on Saturday, at least eight people were killed and 47 injured when a car bomb exploded in the town of Tuz Khurmato, 170km north of Baghdad.

And at least five people were killed and 12 injured when a car bomb detonated amid a traffic jam on the central commercial street in the holy Shia city of Karbala, 110km south of Baghdad.

Four more were killed in two bomb blasts in Nasiriyah, 375km south of Baghdad.

The blasts are the latest in spiralling violence, with bloodshed at its worst since 2008 amid worries of a return to the all-out sectarian war that blighted Iraq years ago.

They come just weeks after brazen assaults on prisons near Baghdad armed groups that freed hundreds of fighters.

More than 800 people were killed in attacks during the Muslim fasting month of Ramadan, which ended this week.

PHOTO CAPTION

Bomb damage in the city of Nasiriyah, where four people were killed [Reuters]

Al-Jazeera