JOHANNESBURG (AP) — Polling stations closed Wednesday evening in elections in South Africa that are expected to see the ruling African National Congress return to power despite a vigorous challenge from opposition parties seeking to capitalize on discontent with corruption and economic inequality.

Voting in the fifth all-race polls in South Africa since the end of white minority rule in 1994 wrapped up at 9 p.m. (1900 GMT) and South Africa’s election commission said the first results were expected in the following hours. Officials will declare final results no earlier than Saturday, allowing time to address any objections to the process.