Unidentified war planes have been reported flying over the Libyan capital Tripoli. Many residents said explosions could be heard.

Security in the city has worsened after more than a month of violence, despite repeated international appeals for an immediate ceasefire.

Fighting between heavily-armed groups has prompted the United Nations and many Western embassies to evacuate their diplomatic staff .

Three years after the fall of Muammar Gaddafi, Libya’s fragile government is unable to control militias of former rebels who are battling for political and economic power.