According to the UNHCHR press secretary, Ravina Shamdasani, the number of those killed is in excess of 5,358 with 12,235 injured.
At the end of January, a UNHCHR representative said there were 5,187 dead and 11,515 injured.
The armed confrontation between Kiev forces and pro-independence fighters began in April 2014, when Kiev sent troops to Ukraine's eastern regions to suppress independence supporters.
In September 2014, the warring sides agreed to a ceasefire during a Contact Group meeting in Minsk, mediated by Russia and the Organization for Security and Co-operation in Europe (OSCE). Since that time both sides have since reported truce violations.
The beginning of 2015 has seen a surge of violence in eastern Ukraine, with a rising death toll among the civilian population. The latest Contact Group meeting on January 31 failed to yield results on settling the crisis.