“We went into the centre of Ramadi from several fronts and we began purging residential areas,” said Sabah al-Noman, spokesman of the Iraqi counter-terrorism service.
“The city will be cleared in the coming 72 hours,” he said.
The fresh push was launched overnight and is meant to result in the full recapture of Ramadi, the capital of Iraq’s western province of Anbar.
The fighting in Ramadi is led by the elite counter-terrorism force, backed by US-led coalition air strikes and also supported by forces from the police, the army and Sunni tribes opposed to the jihadists.
IS has lost several key towns in Iraq since Baghdad and the autonomous Kurdish region started fighting back following the jihadist group’s devastating offensive 18 months ago.