The two husseiniyahs in Sharikhan, north of Nineveh provincial capital Mosul, were bombed early today, damaging the structures but causing no casualties, the sources said.
An offensive since June 9, spearheaded by Sunni jihadists from the Islamic State of Iraq and the Levant (ISIL) but involving other groups as well, has overrun swathes of five provinces, with Nineveh the first to fall.
ISIL militants adhere to a harsh interpretation of Islamic law and consider Shiites, who make up the majority of Iraq's population, to be heretics.