MOSCOW

The leaders of Russia, Angola agreed Thursday to deepen relations and coordinate efforts on international platforms.

Vladimir Putin and Joao Lourenco signed six documents regarding the cooperation in diamond mining, gas and oil production, space and agriculture after a three-day visit by the Angolan president.

Prior to the meeting, Lourenco said Angola is one of the principal buyers of Russian arms and his country wants to "not only buy but also produce them."

Russia delivered six SU-30K fighter jets to Angola this year and two more are expected by the end of May, Angola's Defense Minister Salviano de Jesus Sequeira told reporters.

He said the country is interested in buying Russian S-400 air-defense systems, but there is no talks because of economic difficulties.

"Angolan armed forces are used to work with Russian weapons" and because of that the military cooperation between the two countries "will last forever,", Sequeira added.