Extreme violence and gross human rights abuses, including mass incidents of murder, gang rape and sniper attacks, have sharply increased in Cité Soleil on the outskirts of the Haitian capital Port-au-Prince, said a UN report published Friday, creating “a living nightmare” for thousands. The report comes as 5.2 million people – nearly half of the Haitian population – are in need of humanitarian aid, including 2.6 million children.