KUALA LUMPUR, July 10 (Xinhua) -- Malaysian Prime Minister Mahathir Mohamad turned 93 on Tuesday and has continued to demonstrate his stamina and energy two months after assuming office.

Mahathir became the world's oldest Prime Minister after a surprising electoral victory in May, ending six decades rule by his former Barisan Nasional coalition.

He was previously Malaysia's Prime Minister for 22 years from 1981 to 2003.

Since sworn in again as Malaysia's Prime Minster on May 10, Mahathir has showed no signs of slowing down. He began his daily duties on his 93rd birthday on Tuesday by joining Cabinet ministers and officials for a briefing on Governance, Integrity and Anti-Corruption at the country's anti-corruption body.

Mahathir was quoted as saying by the state news agency Bernama earlier that he advises people not to rest when they grow old.