sentences:  Other camps sometimes described as extermination camps include Maly Trostinets near Minsk in the occupied Soviet Union, where 65,000 are thought to have died, mostly by shooting but also in gas vans; Mauthausen in Austria; Stutthof, near Gdańsk, Poland; and Sachsenhausen and Ravensbrück in Germany.The camps in Austria, Germany and Poland all had gas chambers to kill inmates deemed unable to work.Chełmno, with gas vans only, had its roots in the Aktion T4 euthanasia program.