Taliban and Afghani army forces have continued fighting for the fourth day in Ghazni, after a surprise attack that amounted an estimated 300 casualties.

If the Taliban succeeds in occupying the strategic city, they could potentially control an entire province for the first time in the 17-year Afghan war, making it their most important victory yet.

Mobile phone towers have been destroyed, making communication scarce, but it is understood citizens are unable to safely leave their homes, and that electricity, water and medical supplies are low.