According to reports, a huge blast heard at holy city of Karbala, at Bain ul Haramain, (between Imam Hussain Holy Shrine and Hadrat Abbas Holy Shrine).
According to al-Manar TV a suicide bomber blew himself up. It is claimed that 10 of people have been martyred and injured.
Meanwhile Iraqi officials say attacks in two Shiite-dominated areas in the Baghdad region have killed four people and wounded 11.
A police officer says three roadside bombs went off simultaneously on Sunday in the Shiite Husseiniya area northeast of the capital, killing three civilians. He said 11 others, including three policemen, were wounded.
Another police officer said a soldier was killed when a bomb attached to his car exploded in the northern Utaifiya neighborhood.
Two health officials confirmed the causality figures. All officials spoke on condition of anonymity as they were not authorized to release information to reporters.