German Foreign Minister Frank-Walter Steinmeier is planning to call an informal meeting of the foreign ministers of the Organization for Security and Co-operation in Europe (OSCE), Ukrainian Foreign Minister Pavlo Klimkin said.

"Frank-Walter Steinmeier wants to do an unofficial meeting of the OSCE foreign ministers on September 1," he said in an interview with Channel 5 on Wednesday evening.

Already agreements have been reached to hold meetings, "starting from Boris Johnson and ending with many ministers," Klimkin said.

An unofficial OSCE ministerial meeting is always a very good occasion to talk, and talk very candidly," he said.

"Russia is trying to block the whole OSCE logic entirely," he also said. "Look, Russia is blocking what's happening in Vienna, Russia is blocking the work of the Office for democracy and human rights... and blocking all the other OSCE institutions, for example that of its representative on freedom of the media. So we must reload this Russian pressure to enable the OSCE to continue working," Klimkin said.