The eastern Ukraine records in recent days, a peak of violence that fear the start of a major military action whose first victims could be the 12 civilians killed Tuesday in a bus that was on a Ukrainian dam.
President Poroshenko said he "decided that January 15 would be a day of national mourning in memory of all those who died at the hands of terrorists."
Ukraine accuses pro-Russian separatists of shelling the Ukrainian dam where the bus and being responsible for the death of 12 passengers it carried was.
For its part, Moscow calls not designate responsible before the findings of the investigation.
"I will not go into details, but there are already several versions of what happened," says the head of Russian diplomacy and according to him the Ukrainians as Westerners should refrain from any charge before the findings of the investigation.
The United States condemned the "brutal and repeated" attacks by separatists while a commission of inquiry, consisting of Russian and Ukrainian experts led by the OSCE, should be responsible for shedding light on the tragedy.
