More than 14,000 people have been displaced in days from Ukraine's eastern Kharkiv region, the World Health Organization (WHO) said on Tuesday.

"Over 14,000 people have been displaced in a matter of days, and nearly 189,000 more still reside within 25 kilometers of the border with the Russian Federation, facing significant risks due to the ongoing fighting," Jarno Habicht, the WHO's representative in Ukraine, told media at a press briefing in Geneva, via video-link from Kyiv.