The 85-year-old was admitted to the general ward in a Melbourne hospital for antibiotics treatment and physiotheraphy, his aide Sufi Yusof said in a statement.

"Dr Mahathir's condition is stable and he has been advised to rest," said the aide, adding that the former Malaysian leader is expected to remain in hospital for a few days for observation.

Mahathir arrived in Melbourne Thursday and was slated to address a seminar on human development organised by a club linked to Malaysia's ruling party, the United Malays National Organisation.

Mahathir retired in 2003 after 22 years in power. He remains an influential figure in Malaysian politics, and has often speak up on current issues.

He has undergone two coronary bypass surgeries, one in 1989 and the latest in 2007.

source: http://news.malaysia.msn.com/regional/article.aspx?cp-documentid=4373007