Former Malaysian Prime Minister Mahathir Mohamad, aged 100, was hospitalized on Tuesday after falling at his home, according to his aide Sufi Yusof, who confirmed the information to AFP. The incident occurred as Mahathir was moving from his veranda to the living room. He was later taken to the National Heart Institute for observation. He remains conscious, though it is not yet known whether he will be admitted for a longer stay.

Mahathir has been suffering from various health issues and previously underwent bypass surgery for heart disease. Over his long political career, he led Malaysia through a period of rapid modernization and earned widespread respect and popularity both domestically and internationally.

He served as Malaysia’s prime minister from 1981 to 2003 and again from 2018 to 2020. During his second term, at age 94, he became the world’s oldest elected leader.