Russia and China on Saturday began their joint naval military exercise in the Sea of Japan.

Before leaving the base, servicemen took part in an opening ceremony, also attended by military chiefs from both sides, the statement said.

The drill will last one week and the servicemen of the two countries will train in repelling an attack by a simulated enemy from the air, water and underwater environment, as well as maneuvering.

The crews of the ships will also perform artillery firing and several combat exercises using anti-aircraft and anti-submarine weapons.