Baghdad - At least 30 people were killed and as many as 100 others were injured when two suicide bombers struck a Shiite shrine in Baghdad on Friday, witnesses said.

Witnesses told the German Press Agency dpa that a man detonated explosives strapped to his body at the door to the shrine to a revered, eighth-century Shiite imam in the northwestern Baghdad neighbourhood of Kadhimiya. Soon after, a woman blew herself up at the woman's entrance to the shrine.

Witnesses said that they saw "at least 36 dead bodies" and at least 100 people wounded. The Dubai-based al-Arabiya satellite news network reported that 30 people had been killed in the attack, which targeted Shiites gathering at the shrine for Friday prayers.

Friday's bombings followed the bloodiest day in Iraq this year. On Thursday, a man killed 33 people and himself when he detonated explosives strapped to his body in a crowd queuing up for humanitarian aid in central Baghdad. At least 57 people were wounded in that attack, police told dpa.

Later on Thursday, a man walked into a restaurant full of Iranian pilgrims, near Khanaqin, in the violence-prone Iraqi province of Diyala, and blew himself up. Police said 52 people and the bomber were killed in that attack, and that 68 others had been wounded.

Friday's attack was the third on the shrine this month. Two weeks ago, two bomb attacks over the space of two days killed at least 15 people at the shrine and wounded at least 41 others. Those attacks were apparently timed to coincide with the 62nd anniversary of the founding of the Baath Party and US President Barack Obama's visit to the country. (dpa)