DHAKA: A suicide bombing in a predominately Shia area of Baghdad has left 21 people dead and 25 people injured, CNN reports.

Sources asked not to be identified for security reasons.

The bomber targeted a Shia mosque in the city's northeast al Harithyia neighborhood, the source said.

As of Sunday, there has been no claim of responsibility.

The past few weeks have seen a series of car and suicide attacks on Shia targets, some of which have been claimed by ISIS.

Although Baghdad's perimeter has appeared to hold firm against ISIS encroachment, the militant Sunni group has made strategically valuable gains in the country's Anbar province, west of the capital.

ISIS, which calls itself the Islamic State, has been accused of massacring Shiites in areas it controls.

BDST: 0835 HRS, OCT 20, 2014