( CNN ) -- At least 30 people were killed and 42 injured Sunday when a suicide bomber wearing an explosive vest attacked a mosque south of Baghdad , according to police and health officials . The mosque is located in al-Musayab , about 70 kilometers ( 43 miles ) south of the capital . The attack targeted Shiite mourners , who were at the mosque for a funeral . Iraq has seen a sharp increase in tension between its Shiite and Sunni populations since April , when security forces raided a site used by Sunni protesters to demonstrate against the Shiite-led government . Sunnis , who represent a minority of Iraqis , have felt politically marginalized since the overthrow of Saddam Hussein in 2003 . Shiites , who make up a majority of Iraqis , now dominate the government . In a separate incident Sunday , at least 12 people were killed in an attack on the security headquarters of the regional Kurdish government in Erbil . A suicide bomber in a minibus attempted to enter the facility . Kurdish security forces opened fire , and the vehicle exploded . At the same time , gunmen opened fire and attempted to storm the headquarters , according to a statement from the Kurdistan Regional Government . Of the 12 people killed , six were `` terrorists '' and six were members of the security forces , it said . More than 40 people were injured .
NEW : At least 12 people are killed in a separate attack in Iraq 's Kurdish region . Comment: 42 other people were injured while attending a funeral at the mosque .