 On May 7, a group led by Zivia Lubetkin set out from the Command Bunkhouse under the Miła Street through a complex sewer system to find an escape route from the ghetto.A day later, however, the bunker was discovered by the Germans – at that time, there were three hundred people, including Anielewicz and his girlfriend, and others there.German soldiers fired into the fortified headquarters with gas hoses to expel the hiding Jewish fighters to the surface.