KUALA LUMPUR - Ruling coalition chairman Najib Razak will be sworn in as Malaysia's Prime Minister later Monday, officials said.

Najib is expected to take oath before the Supreme head of state Abdul Halim Mu'adzam Shah at the national palace.

Najib, who took over as Prime Minister in 2009, led the ruling Barisan Nasional to a victory in the general election on Sunday with a slimmer simple majority in the parliament.