The eastern NATO member state will send all 13 of its MiG-29 jets – grounded since last August and in various states of readiness – at an unspecified date.

The 42-second video, released Thursday, shows a Russian Su-27 approaching the back of the MQ-9 drone and beginning to release fuel as it passes.

The U.S. European Command said that 2 Russian fighter jets ‘conducted an unsafe and unprofessional intercept’ of a U.S. drone that was operating within international airspace.

On the front lines in Ukraine, the eastern city of Bakhmut remained the site of fierce fighting, with Ukrainian forces denying Russian forces the prize of its capture after six months of attrition.

Ukrainian authorities say Russian forces are attacking Kostiantinivka with cluster bombs and missiles.