Nato planes start watch on Libya
Nato has started round-the-clock surveillance of the air space over Libya, where government jets have been pounding rebel positions.
The first airborne warning and control plane went on patrol at 6.30am UK time on Thursday.
A Nato official said each of the Boeing E-3 Sentry aircraft will remain over the Mediterranean for eight hours before being replaced by another plane.
Nato has 17 E-3s and the entire fleet is registered in Luxembourg, a country without an air force.
Several planes are currently operating over Afghanistan.