There are mounting security concerns in Haiti's earthquake-hit capital as distribution problems continue to hamper getting aid to survivors. Days after the quake devastated Port-au-Prince, killing tens of thousands, there are some reports of gangs preying on residents and looting. Official say thousands of prisoners are unaccounted for after the main prison was destroyed. Damage to the seaport, roads and other infrastructure has prevented the speedy distribution of food, water and medical supplies. <br/><br/>Relief has been arriving, but little has moved beyond the jammed airport. Much of the aid – tents, blankets and medical supplies – is still sitting on the runway in Port-Au-Prince. The Haitian government has handed over control of the entire facility to the American military. US soldiers have started the tricky operation of controlling the massive amount of air traffic that is now flooding in, and aid agencies from across the globe are arriving minute by minute.<br/><br/>Meanwhile, the authorities say, the devastating earthquake on Tuesday has left over two lakh people killed and about forty thousand bodies are still buried in rubbles. The US Secretary of State Hillary Clinton has said she will go to Haiti today to see the situation there for herself. Her visit will be followed tomorrow by the UN Secretary General Ban ki Moon. The UN has launched an appeal for more than five hundred million dollars to help victims of the earthquake.