The Southeast Asian country has already received six out of 18 Su-30MKM fighters under a $900-million contract signed in 2003. The remaining 12 aircraft will be delivered in two shipments by the end of 2008.
"The Malaysian Royal Air Force is considering a new contract on the purchase of Russian Su-30MKM fighters," the source said.
The Su-30MKM is a multi-role Flanker variant based on the Su-30MKI model and features a customized avionics suite to meet Malaysian specifications.
The aircraft are being manufactured at Sukhoi's Irkutsk aircraft manufacturing plant in Siberia.
Malaysia currently operates a mixed fighter fleet, with the Russian MiG-29N Fulcrum, and the U.S.-made F/A-18D Hornet and F-5 Tiger.