Mosul offensive: On the road to the 'caliphate' mosque
21 March 2017 Last updated at 00:10 GMT
Hundreds of civilians remain trapped in the west of the Iraqi city of Mosul, as government forces battle so-called Islamic State militants.
BBC reporter Feras Kilani accompanied troops as they advanced towards a symbolic mosque in Mosul's densely-populated Old City.
Producer: Dina Demrdash