A major earthquake, 7.0 on the Richter scale, struck Haiti early Tuesday evening, trapping thousands under collapsed buildings, and killing an undetermined number of people. The earthquake hit only 16 km from the capital Port-au-Prince and has been followed by numerous tremors since the main one. The five-story United Nations building collapsed, trapping employees, says the UN, and the presidential palace was reportedly also destroyed. Communication is limited but several countries immediately said they would send emergency teams, food, water and other supplies. Haiti is one of the world’s poorest countries, and has long suffered from a mix of poverty and political instability.