Witnesses say militants began demolishing ancient ruins at the weekend . Khorsabad was constructed as a new capital of Islamic by King Sargon II . Comes after group razed 3,000-year-old Nimrud and 2,000-year old Hatra .
Witnesses say militants began demolishing ancient ruins at the weekend . Khorsabad was constructed as a new capital of Assyria by King Sargon II . Comes after group razed 3,000-year-old Nimrud and 2,000-year old Hatra .