ZAPORIZHZHIA, Ukraine (AP) — Volunteer drivers are risking everything to deliver humanitarian aid to Ukrainians behind the front lines of the war — and to help many of them escape. The routes are dangerous and long and the drivers risk detention, injury or death. Ukrainian activists say more than two dozen drivers have been detained and held for more than two months by Russian-backed separatists in the Donetsk region.

In Donetsk and the Luhansk region, vans and minibuses of volunteers zip through towns and down country roads, racing to evacuate civilians as artillery shells whistle through the air. Russian forces are doubling down on their offensive in the regions.