She stated that the bus shelling plus intensified fighting around the international airport in the city of Donetsk were "just the latest egregious violations of the commitments made by the Russian-backed separatists."
She also added that Russia must do more to stop the violence and restore Ukrainian sovereignty.
On Jan. 13 head of the Donetsk region police Viacheslav Abroskin informed about the militants' artillery strike on a checkpoint of the Ukrainian law enforcement officers near Volnovakha. According to him, as a result of direct hit of the passenger bus 10 people were killed and 13 injured. By the evening the number of death toll rose to 12.