An act of international terrorism: Ukraine reacted harshly to the hostage-taking of OSCE Special Monitoring Mission members On Monday, October 18, Ukraine’s delegate to the Trilateral Contact Group (TCG) on Donbas Settlement, Serhiy Harmash reported that in Horlivka, the town in the area beyond Ukrainian government control, members of the OSCE Special Monitoring Mission are being held in a hotel against their will.