Prior to their execution, three anarchist bombs had detonated at three strategic places on the Buenos Aires railway network on 20 January 1931, killing three and wounding 17.
Prije njihovog pogubljenja, eksplodirale su tri bombe anarhista na tri strateška mjesta željezničke mreže Buenos Airesa 20. siječnja 1931., ubivši tri osobe i ranivši njih 17.