Two bombs exploded this morning in Karachi, Pakistan, the country's largest city. More than 20 people have so far been reported killed in the attack.
The Associated Press reports that the first blast in Karachi targeted a bus carrying Shiite Muslim worshippers, most of them women and children. The second blast occurred near a hospital where the injured were being treated.
In late December, a bomb killed 44 Shiites attending a procession in Karachi to mark Ashura. That's the Shiite holiday commemorating the death of Imam Hussein.
Today's blasts coincide with Arbaeen, the final day of a 40-day mourning period for Hussein.
Meanwhile, a twin car bombing in Karbala, Iraq has killed more than 30 Shiite pilgrims walking to the holy city south of Baghdad for Arbaeen, The AP reports.
Karbala's first blast occurred when a parked car bomb exploded outside one of the city entrances. The blast sent throngs of distressed pilgrims running down the highway, towards a vehicle which a second suicide car bomber blew up.
Two bomb attacks have already killed dozens in Karbala this week.