Russian President Vladimir Putin spoke over the phone with his Turkish counterpart Tayyip Erdogan, the Kremlin announced on Wednesday.

In the context of the upcoming one-on-one meeting at the World Energy Congress (Istanbul, October 10), the two leaders exchanged opinions on topical issues of Russian-Turkish cooperation.

“They noted their interest in the continued gradual restoration of trade and economic ties and the implementation of major joint projects in the energy sphere, in particular building Turkey’s first nuclear power plant, the Akkuyu NPP, and the Turkish Stream natural gas pipeline,” read the statement from the Kremlin.

Putin and Erdogan also addressed the Syria crisis during their conversation.

“They underscored the need to step up international efforts to facilitate the peaceful political process in the country and create conditions to deescalate the situation and resolve pressing humanitarian issues,” concluded the statement.

Putin and Erdogan resumed relations between their two nations after they hit an all-time low following the Russian jet crisis.

Turkish jets downed a Russian Su-24 bomber near the Syrian border for violating Turkish airspace on November 24, 2015.

Ankara provided radar data that the Russian planes breached the border while Moscow released its own data countering that claim and insisted that the warplane had not crossed the border.