Pro-Russian rebels in the separatist stronghold of Slovyansk shot down two government helicopters on May 2, according to the Ukrainian Ministry of Defense. The Ministry reported that two crew members were killed in the incident, and several others were injured.

The attack comes as Ukrainian military forces ramped up “antiterrorist” operations in the eastern part of the country and Moscow has accused Kiev of launching a “criminal” assault that destroyed hopes of peace.

Andrei Petrov shot this video, which he says shows a Ukrainian military helicopter flying over Slovyansk. Credit: YouTube/Andrei Petrov