Malaysia's state oil company Petronas has signed a three-year deal with the Philippine National Oil Company (PNOC) to introduce its natural gas-powered Enviro 2000 cars to the Philippines.

Petronas and PNOC will initially embark on a six-month field demonstration in Manila involving six Enviro 2000s.

The two companies will also investigate the logistics of constructing natural gas refuelling stations.

Petronas, Malaysia's largest company, said it also plans to sign a similar agreement with Singapore's largest taxi company, Comfort Group, in the near future.

Petronas first launched the vehicle in Malaysia in 1998. There are around 5,000 such cars in the country, mainly in Kuala Lumpur.