Donetsk leader said the area is increasing the supply of coal to foreign customers with great demand, including Turkey.

Vitaly Khotsenko, the leader of the People's Republic of Donetsk (DPR) claiming to, responded to Russian news agency Ria Novosti on October 5, said coal in this region was exported to Turkey to transport to countries.

A miner working at a coal mine in Shakhtarsk, Donetsk, September 22, 2016.

Khotsenko explains that coal is being exported to traditional markets.

The Donbass region, including two provinces of Lugansk and Donetsk, have abundant resources such as oil, gas, coal and iron ore.

On October 5, President Vladimir Putin signed the law of 4 Treaties to merge the People's Republic of Donetsk (DPR) and Lugansk (LPR) self -proclaimed with Kherson and Zaporizhzhia into Russia after organizing a referendum.

Turkey is a NATO member, but strengthens cooperation with both Russia and Ukraine.

The Russian areas are controlled in four provinces of referendum to merge into Russia.

Merging 4 Ukraine provinces, Putin not only wanted to create a political victory, but also expected to achieve a strategic position and increase economic pressure with Kiev, according to experts.