The US and other world powers have said they are ready to arm Libya’s UN-backed unity government to help it fight the self-styled Islamic State (IS) group.

Speaking in Vienna, US Secretary of State John Kerry said world powers would back Libya in seeking exemption from a UN arms embargo.

He said IS was a “new threat” to Libya and it was “imperative” it was stopped.

Last month, the Libyan government warned that IS could seize most of the country if it was not halted soon.