Libya crisis: Misrata rebels' plea for Nato help

Libyan rebels outside Misrata are calling for more help from Nato, after more than a month camped in the dunes around the besieged city.

Nato has increased its efforts in the area, with warships and Apache helicopters targeting Gaddafi-loyal positions along the coast and in the nearby town of Zlitan.

But the front lines around Misrata have hardly moved in weeks, and the rebels say they are running low on vital resources.

Andrew Harding reports from Misrata.