Libya protesters storm parliament building in Tobruk
By Robert Plummer
Angry protests against feuding leaders grip Libyan cities
By Ahmed Elumami
UN secretary general urges calm in Libya as protests spread
By Patrick Wintour
Protesters storm Libya's eastern parliament building in Tobruk, local media reports
By Mohammed Tawfeeq & Ivana Kottasová
Libyan protest movement says it will step up its campaign
By Ahmed Elumami & Angus Mcdowall