According to Interfax, citing a statement by UN Secretary General António Guterres, the document "has just been signed".
Guterres called the signing of the document a "beacon of hope in the Black Sea".
The UN Secretary General expressed hope that the agreements reached would be fully respected.
Guterres thanked Turkey for helping to organize negotiations between Russia and Ukraine.
Earlier it was reported that in the EU they fear the start of mass starvation if an agreement on the export of grain cannot be reached. Russia and Ukraine, which are fighting, are the largest suppliers of grain. Without their participation in the grain trade, the world's food security could be jeopardized.