Ukrainian forces pile pressure on retreating Russian troops

A Ukrainian soldier helps a wounded fellow soldier on the road in the freed territory in the Kharkiv region (AP)

Ukrainian troops have piled pressure on retreating Russian forces, pressing a counter-offensive that has produced major gains and delivered a stunning blow to Moscow’s military prestige.

As the advance continued, Ukraine’s border guard services said the army took control of Vovchansk – a town just two miles from Russia which was seized on the first day of the war.