One invader was captured and another four were killed during a skirmish as a Ukrainian special operations unit confronted an enemy recon group near Ukraine's position in Donbas on February 18.

"The special forces unit that is operating in the defense zone of one of our brigades in the northern line spotted the enemy sabotage and reconnaissance group moving toward our observation posts," the press center of the Joint Forces Operation wrote on Facebook.

Read alsoUkrainian army gets over 100 upgraded T-64 tanks (Video)

"The enemy retreated after a skirmish erupted. Four militants were killed and one was captured. A detainee is being interrogated now," the report says.