. >>> renews a probe into a coverup by president kris chris areina kirsh inner. battle is getting worse near debaltseve. the rail railway junction, near the rebel stronghold of donetsk. there is also shelling in luhansk. >> this is not just an attack of the ukrainian sector, but the minsk result. after minsk the offensive operation of russia, intensified significantly. >> at least 25 have been killed since the ceasefire was signed. charles stratford reports from the front line there. >> ukrainian tanks behind me are in a support position for what is believed to be 8,000 ukrainian soldiers in the town of debaltseve. separatists say they have surrounded the town. become a major stronghold, if the separatists take control of debaltseve, it will give them a direct route via rally way to russia. ukrainian fighting close by. everything is destroyed said this ambulance driver, you can't get into town and there are dead bodies on the road. we pushed up further towards debaltseve. we're here at a ukrainian army check point. there is a lot of heavy weaponry going towards t