Poland's Ambassador to Ukraine Jan Pieklo believes cooling in the relations between Ukraine and Poland over the Volyn tragedy will be beneficial only to Russia.

"We both know that Russia will be the only one who will benefit from the marred relations between the two countries over historical issues," Pieklo said in an exclusive interview with Interfax-Ukraine.

According to the ambassador, the number of bilateral visits of high-ranking officials demonstrates the importance of the Ukrainian-Polish relations on the agenda of the two countries.

The Polish diplomat also said that the two countries set up an ad hoc commission which consists of 12 people to study the events in Volyn region during World War II.

A roadmap of the commission's meetings is designed for a year and a half, a report will be published upon the completion of the mission which will contain the [commission's] findings," Pieklo said.