New Delhi, Sept. 8 -- Guyana's President Irfaan Ali was sworn in for a second term Sunday after winning last week's elections, as the South American country reaps a windfall from offshore oil and gas production.

The electoral commission certified Ali's win on Saturday, saying he had "secured a resounding victory" and his People's Progressive Party had secured a majority in Parliament, with 36 of the 65 seats.

Guyana, wedged between Brazil, Venezuela and Suriname, has drawn increasing attention for the vast oil reserves discovered offshore a decade ago and mineral wealth. The resource-rich Essequibo region - administered by Guyana but claimed by Venezuela - remains a point of tension.

Ali has won praise for channeling some of Guyana's n...