Ukraine has condemned unsubstantiated claims by Russia that Kyiv might use a "dirty bomb" - conventional explosives laced with radioactive material.

President Volodymyr Zelensky said this meant Russia itself could be preparing an attack of this kind.

Ukraine's allies also dismissed the claims, with the US saying it "rejected any pretext for Russian escalation".

Please subscribe HERE http://bit.ly/1rbfUog

#Russia #Ukraine #BBCNews