Behind the scenes at the summit, time was spent trying to persuade the Egyptian government and United Arab Emirates to stop supporting the forces of Gen Khalifa Haftar, the military leader in Tobruk who has refused to recognise the Tripoli government even though it has UN recognition.
Foreign ministers hold Vienna talks as Isis threat to Libya grows
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A split between the east and west of the country has left it in stasis and allowed Isis forces to gain a firm foothold.
The west would like to see Haftar link up with the Sarraj Government of National Accord (GNA), which is based in Tripoli, ideally by agreeing to work under a unified military command. At present both the GNA and Haftar claim they are advancing on the Isis stronghold of Sirte, but there is scepticism that Haftar has the logistical ability to reach the city.