OSCE Chairperson-in-Office and German Foreign Minister Frank-Walter Steinmeier has invited colleagues from OSCE member countries to an informal meeting in Potsdam in Germany on September 1.

"Talks will focus on common challenges for the security of the OSCE region and deepening the cooperation between OSCE participating states," the OSCE press service said in a report.

"A special emphasis will be put on the engagement of the OSCE in crisis and conflict management, especially in Ukraine, and in the fight against terrorism, as well as matters of arms control," it said.

"The meeting also serves as preparation for the OSCE Ministerial Council, which will be held at the beginning of December in Hamburg," the report said.