 Then, posters signed by a Dr. Ludwig Fischer appeared on the walls stating that more hostages would be taken and curfew would be enforced from 8 p.m. to 5 a.m. 

Fischer threatened to shoot all hostages unless those responsible for assassination were found.All theatres were closed, and about 120 people were arrested, including teachers, physicians, lawyers and actors.The population of Warsaw was given three days to find Sym's murderers.