Nato is not doing enough to destroy heavy weaponry used by Muammar Gaddafi's forces in Libya, France's foreign minister has said.

Libyan civilians remain at risk, Alain Juppe said, despite an ongoing bombing campaign now led by Nato.

"Nato must play its role fully. It wanted to take the lead in operations," Mr Juppe said, saying efforts so far were "not enough".

Libyan rebels opposing Col Gaddafi have been pushed back despite the air raids.