"In our opinion, yesterday's fighting around Marinka near Donetsk in eastern Ukraine is a huge violation in the Minsk cease-fire agreement," Kocijančič told journalists, Censor.NET reports Ukrinform.
She said the escalations in the conflict had led to the redeployment of a large number of heavy artillery back near the line of contact.
"This fighting threatens the launching of a new spiral in violence and human suffering," she said, adding that that the EU was preparing an official statement on the matter.
During yesterday's attack the militants lost 80 killed and 100 wounded. 10 units of enemy equipment were destroyed.