Ban Ki-Moon, the Secretary-General of the United Nations, calls for a ceasefire during Ramadan.
Riad Hijab, coordinator of the opposition High Negotiations Committee, in a letter to United Nations Secretary-General Ban Ki-moon proposes a nationwide truce for the month of Ramadan which begins 6 June 2016.
Former New Zealand prime minister Helen Clark is running for Secretary-General of the United Nations, to succeed Ban Ki-moon whose second term expires at the end of this year. Clark, who is the first non-European and fourth woman among the eight announced candidates, was prime minister for nine years (1999–2008) and has been Administrator of the United Nations Development Programme since April 2009. The United Nations Trusteeship Council will begin preliminary meetings with candidates next week in New York City.
The United Nations Security Council unanimously adopts a resolution setting the stage for the deployment of UN Police to Burundi, where political unrest that has lasted nearly a year killed over 400 people and displaced tens of thousands. The resolution asks Secretary-General Ban Ki-moon to present options within 15 days for the deployment of UN police in order to monitor the security situation, promote respect for human rights and advance the rule of law.
Ban Ki-Moon, the Secretary-General of the United Nations, calls for a new investigation into the death of former Secretary-General Dag Hammarskjöld in a plane crash after a panel he appointed uncovers new evidence.
An international conference on the future of Afghanistan opens in Kabul co-chaired by the President of Afghanistan Hamid Karzai and the Secretary-General of the United Nations Ban Ki-moon. The conference endorses a goal for Afghan forces to lead security operations across the country by 2014. Afghan President Hamid Karzai suggests raising the size of the Afghan National Army to 170,000 troops and the Afghan National Police to 134,000 officers by 2011.