Fierce fighting rages in Ukraine's Kharkiv region as Russia touts gains  ABC NewsUkraine: Hundreds flee Kharkiv area after Russian cross-border attack  BBC.comRussia-Ukraine war: List of key events, day 807  Al Jazeera EnglishRussian attack on Kharkiv continues as Moscow says it has taken five villages  The GuardianUkraine says Russia is trying to break through its defences in the northeastern Kharkiv region  9News