From a report in The Globe and Mail, 26 February 2017:
… in Sartana … Three residents who spoke to The Globe and Mail, including two whose homes were damaged by separatist rockets, said they heard sustained artillery and tank fire from the Ukrainian side before the separatists returned fire. … There have been similar reports from Avdiivka … several media reports suggested it was the Ukrainian side that first moved troops into the no-man’s land between the two front lines, drawing the ferocious response from the separatists.
Editorial in The Globe and Mail, 28 February 2017:
Less than a week after a supposedly friendly phone call between the two [Putin and Trump] at the end of January, the pro-Russian forces in the southeast of Ukraine – the so-called Donetsk People’s Republic – tripled their warfare against Ukrainian government forces. … the pro-Russian rebels of the Donbass region – or their masters in Moscow – seem to have calculated well. The rebels have now increased their pressure on a Ukrainian port, Mariupol, on the Black Sea, which is vitally important to Ukraine. … Mr Trump needs to respond in a sensible and forceful manner.
Explain that if you can.