Censor.NET reports referring to OSCE press service.
"The environment the sides have created along the contact line is unacceptable. The deterioration in the security situation has also hampered repairs of essential infrastructure - vital to restoring some normality in people's lives," Apakan stressed.
He is concerned by "the highest level of cease-fire violations in the Donetsk region since the sides recommitted to the cease-fire in September 2015."
"In light of these worrying developments, we call upon all sides to honor the commitments they have made, in particular in upholding a sustained cease-fire and ensuring the safety of civilians in the conflict zone," the chief monitor said.