Assistant President Podolyak said Ukraine will only sign an agreement on cereal exports to Turkey and the UN, not directly signed with Russia.

Ukraine will not sign any document with Russia.

Podolyak also warned that Ukraine would respond to military response to any provocative act of Russia, but did not specify the measure.

The assistant of the Ukrainian president also stated that the country did not allow ships and Russian representatives to go to ports for grain exports.

The grain harvesting machine harvested and moved to a truck in the field near Mykolaiv, southern Ukraine in July 2013.

Ukrainian Infrastructure Minister Oleksandr Kubrakov led the delegation to the city of Istanbul, Turkey on July 22 to solve the problem related to millions of tons of grains trapped due to war with Russia.

The Ukrainian Infrastructure said UN Secretary General Antonio Guterres expressed his support for the unloading of Ukraine's ports and ensures that security is an undeniable priority of the UN.

About 25 million tons of wheat and Ukrainian cereals are stuck in the towers containing the black sea.

Exporting cereals is said to be the cause of global food prices, and at the same time raise concerns about famine, especially in the poorest countries in the world.

Russia rejected the allegations to seriously make the food crisis, saying that the main reason was from Western sanctions to exporting goods and fertilizer of this country.

Turkey said it would join Russia, Ukraine and the UN Secretary General to sign an agreement to restore cereal exports in the Black Sea today.

Tens of millions of tons of cereals are still trapped in Ukraine, causing farmers to pile up when they are about to enter a new harvest.