The Tunnels Under Tripoli - For Escape Or Insurgency?

There are press rumours of a vast network of tunnels under Tripoli. It is being suggested that Col. Gadhafi is hiding down there, in a sort of 'city under the city'.

Could this tunnel system be neither an escape route or a final bolt hole, but a means of transporting men and matériel around the city, popping up, engaging it a quick firefight, then dropping down into the tunnels again. If this is true, it will make keeping control of Tripoli the Devil's own job! The NTC may have to set up an army of tunnel rats to deal with this tunnel network (if it even exists).