Malaysia’s Mahathir Mohamad becomes the world’s oldest leader

Mahathir Mohamad has been sworn in as prime minister of Malaysia after his shock election victory, 15 years after he stood down.

After taking the oath at the Istana Negara palace in Kuala Lumpur, he told reporters his focus would be on the country’s finances.

The former strongman has become, at 92, the world’s oldest elected leader.

He came out of retirement and defected to the opposition to take on and beat former protege Najib Razak.

His historic win ousted the Barisan Nasional (BN) coalition, which has been in power since independence in 1957.

Mr. Mahathir was sworn in on Thursday as the new prime minister — the world’s oldest elected head of government — promising to fight corruption, prosecute Mr. Najib and unite this diverse nation of 31 million people.