Russia is currently implementing an advanced anti-ship missile delivery contract with Syria, Federal Service for Military-Technical Cooperation head Mikhail Dmitriyev said.

RIA Novosti quoted the head as saying: "This contract is under implementation."

The Yakhont missile has a range of 300km, can carry a 200kg warhead and is difficult to detect and intercept by cruising several metres above the water surface.

Russia signed a controversial deal with Syria in 2007 to supply several Bastion anti-ship missile systems armed with SS-N-26 Yakhont supersonic cruise missiles.