A suspected leader of the group Islamic State in Iraq, which has ties to the al-Qaeda terrorist network, was detained in northern Iraq on Sunday, Iraqi security forces reported, according to Deutsche Presse Agentur dpa. Muharib Mohammed Abdullah, aka Abu Omar al-Baghdadi, was arrested in a joint raid by Iraqi and US soldiers in the city of Duluiya. "This is a great success for the Iraqi security forces, comparable to the killing of Abu Mussab al-Zarqawi," the Salaheddin provincial administration in the town of Tikrit said in a statement. Abdullah is a former legal expert from the city of Balad, north of Baghdad.