The leader of the UAR, Nasser, began publicly calling for Arab unity. Various nations, including Lebanon, blamed Nasser's actions for the increase in sectarian unrest, and the Lebanese government filed a formal complaint to the United Nations Security Council (UNSC) on 22 May 1958, accusing the UAR of meddling in the nation's affairs. The UNSC passed a resolution on 11 June 1958 that recommended sending a group to Lebanon "to ensure that there is no illegal infiltration of personnel or supply of arms or other material across the Lebanese borders". A "Group of Three"Galo Plaza, Rajeshwar Dayal, and Odd Bull Dag Hammarskjöld, the Secretary-General of the United Nations, and members of the United Nations Truce Supervision Organization were soon dispatched to Lebanon to form the United Nations Observation Group in Lebanon (UNOGIL).