"We expect more ambassadors and senior figures to do the same in the coming days"
More senior Libyans are expected to follow the foreign minister in defecting from Colonel Gaddafi "within days", the country's mission to the UN told Sky News
A spokesman on behalf of the mission also said they had anticipated more senior Musa Kusa's decision to abandon the dictator.
"We've been expecting his defection for some time and we expect more ambassadors and senior figures to do the same in the coming days," he said.
"We welcome such an action. This will make the Gadaffi regime weaker. His defection exposes the lies that the regime are putting out.
"Kusa knows that Colonel Gadaffi is finished."It came as Prime Minister David Cameron used a press conference in Downing Street, to urge others within the regime to "come to their senses" and change sides.
"It shows a certain amount of distrust, decay and breakdown at the heart of the Gaddafi regime," he said. "The decision... to come to London to resign his position is a decision by someone right at the very top.
"It tells a compelling story of the desperation and the fear right at the very top of the crumbling and rotten Gaddafi regime