Grisly urban warfare looms unless west beefs up Ukraine arms supply

Analysis: Front line will move into heart of cities unless Ukraine gets more weapons that can target Russian artillery

Burning apartment blocks across Mariupol; shattered buildings in Kharkiv. Film and photographs circulating on Monday show the brutal consequences of Russia's onslaught in eastern Ukraine, the result of a succession of air, missile and above all artillery strikes that frequently fall on civilian targets.

Russian forces are still struggling to capture more of Ukraine's cities - but while the defending forces are stocked with shoulder-mounted anti-tank and anti-aircraft weapons, they do not appear to have a counter to the indiscriminate artillery shelling from which civilians are desperate to escape.