At least 20 people were killed and 50 others wounded on Thursday evening in an attack on a Shi'ite mausoleum north of Baghdad, security sources said, Reuters reported.
The site, the Mausoleum of Sayid Mohammed bin Ali al-Hadi, is located in Balad, about 93 kilometers (58 miles) north of Baghdad.
A suicide car bomb blew up at the external gate of the mausoleum, allowing several gunmen to storm the site and start shooting at pilgrims on a visit on the occasion of the Eid al-Fitr festival.