the latest movement in a fierce fight against isis since the terrorists took hold of that critical region in may. we have robyn kriel live with the latest. >> reporter: fierce fighting ever since iraqi forces entered parts of the city early yesterday morning in a daring raid. we understand that the united states has been helping, as well. they have been launching a number of air strikes, the u.s.-led coalition has been launching a number of air strikes, hitting weapons caches and command posts. they also helped build a bridge that was used in a daring move, a temporary bridge because isis has destroyed all the bridges around the city of ramadi. the city is enclosed by a number of canals really from the euphrates river. iraqi troops crossing over that bridge early morning and entering in a daring morning raid. commandos are trying to advance