Military spokesman Andriy Lysenko told reporters that the first deaths in over a week occurred in Avdiivka, a flashpoint northern suburb of the rebels' de facto capital city of Donetsk, "where the situation has escalated".
The pro-Western leadership in Kiev and the rebels agreed to a new truce that went into effect on April 1 and has largely held through the Easter holidays.
Ukraine reported the loss of one soldier in fighting on April 13 and two on April 3.
The separatists have reported 10 combat losses since the latest temporary ceasefire was agreed with the help of negotiators from the Organization for Security and Co- operation in Europe (OSCE).
Neither sides' toll claims could be independently confirmed.
Disclaimer: No Business Standard Journalist was involved in creation of this content
