The UN has urged rival forces fighting near the Libyan capital to halt fighting for two hours so casualties and civilians can be evacuated.\r\nOn Sunday rebel forces under Gen Khalifa Haftar said they had carried out an air strike in southern Tripoli.\r\n\r\nGen Haftar's troops have advanced from the east with the aim of taking the capital, Tripoli.\r\n\r\nThe UN-backed prime minister has accused him of attempting a coup and says rebels will be met with force.\r\n\r\nThe UN said hostilities should cease at 16:00 local time (14:00 GMT) to allow access for the emergency services.\r\n\r\nInternational powers have also begun evacuating personnel from Libya amid the worsening security situation\r\n\r\nLibya has been torn by violence and political instability since long-time ruler Muammar Gaddafi was deposed and killed in 2011.\r\nWhat's the situation on the ground?\r\nGen Haftar's Libyan National Army (LNA) forces have been carrying out a multi-pronged attack from the south and west of the city since Thursday.\r\n\r\nOn Sunday the LNA said it had carried out its first air strike, a day after the UN-backed Government of National Accord (GNA) hit them with air strikes on Saturday.\r\n\r\nFighting has continued around the disused international airport south of the capital that Gen Haftar earlier said his forces had seized.\r\n\r\nForces loyal to the GNA have slowed the advance and on Sunday a GNA spokesman told Al-Jazeera TV that the GNA now intended to "cleanse" the whole of the country.\r\nWhat evacuations have already taken place?\r\nUS Africa Command, responsible for US military operations and liaison in Africa, said that due to the "increased unrest" it had relocated a contingent of US forces temporarily, but gave no further details on numbers.\r\n\r\nThere were reports of a fast amphibious craft being used in the operation.\r\n\r\nIndia's External Affairs Minister Sushma Swaraj said its full contingent of 15 Central Reserve Police Force peacekeepers had been evacuated from Tripoli because the "situation in Libya has suddenly worsened".\r\n\r\nImage copyrightREUTERS\r\nImage captionA market in Tripoli. Residents are said to be stocking up on suppliesThe Italian multinational oil and gas company, Eni, decided to evacuate all its Italian personnel from the country.\r\n\r\nThe UN is also due to pull out non-essential staff.\r\n\r\nResidents of Tripoli have reportedly begun stocking up on food and fuel. But BBC Arab affairs editor Sebastian Usher says many of those near the fighting are remaining in their homes for now, for fear of looting should they leave.\r\n\r\nSome fear a long operation, which Gen Haftar mounted to take the eastern city of Benghazi from Islamist fighters.\r\nWho are the opposing forces?\r\nLibya has been wracked by unrest since the overthrow of Col Gaddafi. Dozens of militias operate in the country.\r\n\r\nImage copyrightAFP\r\nImage captionGen Haftar has ordered his forces to advance on TripoliRecently they have been allying either with the UN-backed GNA, based in Tripoli, or the LNA of Gen Haftar, a tough anti-Islamist who has the support of Egypt and the UAE and is strong in eastern Libya.\r\n\r\nGen Haftar helped Col Gaddafi seize power in 1969 before falling out with him and going into exile in the US. He returned in 2011 after the uprising against Gaddafi began and became a rebel commander.\r\n\r\nThe unity government was created at talks in 2015 but has struggled to assert national control.\r\n\r\nPrime Minister Fayez al-Serraj delivered a TV address on Saturday, saying he would defend the capital.\r\n\r\nMr Serraj said he had offered concessions to Gen Haftar to avoid bloodshed, only to be "stabbed in the back".