Adama Barrow was inaugurated Thursday in a hastily arranged ceremony at Gambia's embassy in Senegal. The small embassy room held about 40 people, including Senegal's prime minister and the head of Gambia's electoral commission.
A jumbo TV screen broadcast the swearing in ceremony to several hundred watching outside the embassy
Also at the event were officials from West Africa's regional bloc, ECOWAS, which is threatening to invade Gambia to force outgoing president Yahya Jammeh to step down.
The U.N. Security Council was set to vote later Thursday on a draft resolution endorsing the West African regional force's efforts to remove Jammeh.