Ukraine has accused pro-Russian rebels of carrying out the heaviest artillery attacks on government positions in six months. Ukrainian authorities have warned of mounting signs that the conflict was escalating.
Russia's War Against Ukraine
Deutsche Welle: Ukraine reports heavy shelling and warns of imminent escalation
A picture taken on Aug. 9, 2015 shows burnt vehicles of OSCE (Organisation for Security and Co-operation in Europe) observers based in the separatist stronghold of Donetsk in eastern Ukraine.
