Witnesses in the Ukrainian port city of Mariupol reported sustained explosions outside the city this morning, and a volunteer battalion of Ukrainian fighters says Grad rockets were fired at its positions.
Russia's War Against Ukraine
Irish Times: Ukraine ceasefire under threat as shelling reported near Mariupol
Three dozen men of varied ages attend a training session at the base of Ukrainian self-defence battalion Azov in Mariupol, 4 September, 2014.
