Video report (in Ukrainian) from our Ukrainian Service on the scene following the deadly bomb attack in Kharkiv:
Follow developments in Kharkiv via our newsroom here:
Kharkiv On Security Alert Following Deadly Blast At Peace March
Ukrainian President Petro Poroshenko has called those responsible for the February 22 bombing of a pro-government rally in Kharkiv "terrorist scum."
"Today is memorial Sunday, but on this day terrorist scum revealed its predatory nature," Poroshenko said in a Facebook post. "This is a bold attempt to expand the territory of terrorism."
Authorities say at least two people were killed in the blast, while numerous others were injured. Ukrainian officials say four suspects have been arrested and that they were trained and armed in Russia.
Here's an update from our newsroom:
European Council President Donald Tusk has said he will initiate consulations with European Union leaders on the possibilty of expanding sanctions against Russia for its policies in Ukraine.
Tusk made the comments on February 22 in Kyiv after viewing an exhibition of Russian military equipment captured by Ukrainian security forces during fighting with Russia-backed separatists in eastern Ukraine.
Tusk said he will begin the consultations on February 23.
Tusk participated in a Dignity March to mark the first anniversary of the ouster of former Ukrainian President Viktor Yanukovych together with the presidents of Germany, Lithuania, Moldova, and Poland.
The EU expanded its black list of Russian and Ukrainian individuals and entities under sanction on February 16, adding two Russian deputy defense ministers, two State Duma deputies, and 15 separatist leaders.
UNIAN reports that a 15-year-old boy who suffered a serious head injury as a result of the February 22 bombing of a Kharkiv peace parade has slipped into a coma and is in "grave condition."