Election authorities in the South American nation of Guyana declared opposition applicant Mohamed Irfaan Ali as the country’s president, ending a political stalemate that had hampered the region’s most recent oil-creating nation given that March.

Mr. Ali, a forty-year-old former housing minister and lawmaker, was sworn into workplace Sunday, promising to unify the former British colony that has extended been plagued by ethnic rivalry concerning citizens descended from Africa and India who make up the the greater part of its nearly 800,000 population.