Prime Minister Najib Abdul Razak announced the cost of the Mass Rapid Transit (MRT) project to be RM21 billion, which is RM2 billion less than the expected expenditure.

"This means we saved about RM2 billion," Najib said after launching the first phase of the MRT at Kwasa Damansara in Selangor.

Najib also annonced that commuters can ride the MRT for free for a month, and charges for the service would come into effect starting Jan 17.