Muhammadu Buhari has been sworn in for a second term as president of Nigeria at a ceremony in the capital, Abuja.

The president took his oath of office in traditional dress – simple white robes and an embroidered hat.

The 76-year old leader, in power since 2015 and re-elected in February, took the oath of office for a second four-year term in the capital Abuja.

“I do solemnly swear that I will be faithful and bear true allegiance to the Federal Republic of Nigeria,” he said. “I will preserve, protect and defend the constitution.”

Mr Buhari’s to-do list includes reviving a weak economy and tackling rampant corruption and insecurity.

Buhari took the oath of office at what officials called a “low-key” ceremony.

Buhari was re-elected with 56 percent of the vote in Africa’s most-populous nation — and top oil producer — after a delayed poll that angered voters.