“We call on Russia to use its influence to end this campaign of intimidation and honour its commitment to allow free, full and safe access to the OSCE monitors,” State Department spokeswoman Heather Nauert said, commenting on reports of the shelling of an OSCE mission vehicle on June 20. The diplomat is convinced that behind the attack on the observers were “Russian-backed, Russian-sponsored and Russian-prepared separatists.” According to Nauert, the US is “deeply concerned” about a pattern of violence by Russian-backed separatists in eastern Ukraine targeting unarmed civilians of a European mission monitoring the conflict in region.