At least 11 civilians, including a pregnant woman, were killed and 28 injured after Russian forces shelled Ukraine's northeastern Kharkiv province amid a 10-day-old offensive to carve out "a buffer zone.

Both sides have been looking for ways to inflict damage beyond the battlefield, targeting military logistics hubs and urban centers.

Satellite images of Russia's Olenya airfield in Murmansk Oblast suggest preparations for a massive missile strike on Ukraine, military portal Defense Express reported on May 19.

The latest surge in unmanned aerial warfare between Ukraine and Russia is ringing alarm bells across the international community, as both nations engage in a tit-for-tat escalation that sees critical infrastructure and military targets under heightened threat.