Poles didn't support the Ukrainian authorities and set up an underground resistance movement that engaged in acts of sabotage. All fieldwork was stopped, the harvest destroyed and machinery purposely broken; Poles also issued to keep up the morale among the population. In response Ukrainian authorities engaged in terror, including mass executions, court martial and set up detention centers where some Poles were interned. The conditions in these camps involved unheated wooden barracks, lack of bedding and lack of medical care, resulting in high levels of morbidity from typhoid. Estimated casualties at these camps include nearly 900 at a camp in Kosiv, according to various sources from 300 to 600 (dying from typhoid) in Mikulińce, 100 in Kołomyja, and 16 to 40 in Brzeżany, due to unheated barracks at temperatures of -20 degrees Celsius. Cases of robbing, beating, torturing or shooting of Polish prisoners were reported.