evan greer there. russian foreign minister, sergei lavrov, has again suggested there's a danger of the conflict with ukraine leading to a third world war, but he said he expected it to end with a peace agreement. mr lavrov said nato was in effect engaging in a proxy war with russia, and that weapons delivered to ukraine from the west would be, what he called, legitimate targets. five train stations were struck by russian missiles in western ukraine on monday. the railways have become a key target for russian forces, as they're crucial for both bringing in supplies and evacuating civilians. meanwhile, unrelenting russian attacks continue in the eastern donbas region. there's been fighting there since 2014, between ukrainian troops, and separatists, backed by moscow. russian artillery has been targeting towns and cities, where mainly civilains have been sheltering in basements, short of food and water. our defence correspondent jonathan beale has travelled close to the frontlines. birdsong explosion the