(CNN) -- Prosecutors in Hungary indicted a Nazi war crimes suspect Tuesday with involvement in the brutal treatment and deportation of thousands of Jews during World War II. Ladislaus Csizsik-Csatary was allegedly "actively involved" in sending nearly 12,000 Jews to various concentration camps in the spring of 1944, according to the Metropolitan Chief Prosecution Office in Budapest. According to prosecutors, Csizsik-Csatary served as a senior Hungarian police officer in the city of Kosice, which is now in Slovakia but was under Hungarian rule in the 1940s. Csizsik-Csatary topped the Simon Wiesenthal Center's list of "most wanted Nazi war criminals" as of April this year.Prosecutors allege Ladislaus Csizsik-Csatary was "actively involved in" deporting JewsNearly 12,000 Jews were sent from Kosice to German concentration camps in 1944Csizsik-Csatary was commander of the deportation camp, prosecutors sayHe tops the Simon Wiesenthal Center's list of "most wanted Nazi war criminals"
During that month, he "regularly beat the interned _ with his bare hands and whipped them with a dog-whip without any special reasons and irrespective of the sex, age or health condition of the assaulted people," the indictment alleges.