Russian authorities have threatened to investigate some of the steel mill's defenders for war crimes and put them on trial, branding them “Nazis” and criminals. That has stirred international fears about their fate. The steelworks, which sprawled across 11 square kilometers (4 square miles), had been the site of fierce fighting for weeks. The dwindling group of outgunned fighters had held out, drawing Russian airstrikes, artillery and tank fire, before their government ordered them to abandon the plant's defense and save themselves.