"The minister's advisor Zorian Shkiryak, who is currently in the area of the anti-terrorist operation, has informed that today, at 20:00, terrorists opened fire at the frontline of the anti-terrorist operation forces, particularly the National Guard's attack battalion 'Azov' in Shirokino," a statement, released on the official website of Ukraine's Interior Ministry early on Sunday says.
Shirokino is a village located in Ukraine's southeastern region of Donetsk. It was considered a neutral territory before it was occupied by Kiev forces at the beginning of February.
Apart from a full ceasefire, the agreement stipulates, among other things, the establishment of a secure buffer zone in southeastern Ukraine through the withdrawal of heavy weaponry from the line of contact between the two sides and an all-for-all prisoner exchange.
After the ceasefire formally entered into force on February 15, the Organization for Security and Co-operation in Europe (OSCE) said that with the exception of certain locations the truce in eastern Ukraine was generally observed.
Ukrainian volunteer battalions, such as Donbas, Azov and Dnipr, were formed in April after Kiev launched a military operation against independence supporters in southeastern Ukraine. In November, the volunteer divisions, far-right in their ideologies, were put under the command of the Ukrainian Army.