Three Ukrainian soldiers had been killed in action (KIA) and eight had been wounded in action (WIA) in the Anti-Terrorist Operation (ATO) zone as of 18:00 Kyiv time on Monday, the ATO Headquarters has reported.

"The situation in the ATO zone remains tense. Most of the attacks on the Ukrainian army's position with the use of heavy weapons were registered in the Mariupol sector," the ATO HQ said in a new update on Facebook on Monday evening.

Earlier reports said about two KIA's and seven WIA's on Monday.