Wall Street bombing of 1920, bombing that struck Wall Street in New York City on September 16, 1920, killing 38 people and injuring hundreds more. No group claimed responsibility for the crime, which remains unsolved.

Wall Street bombing of 1920 Aftermath of a bombing on September 16, 1920, at Wall Street and Broad Street in New York City that killed 38 people and injured hundreds. Library of Congress, Washington, D.C.

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About noon on September 16, as Wall Street clerks, receptionists, and brokers were heading for lunch, a horse-drawn cart exploded in front of the offices of J.P. Morgan & Co. at the corner of Wall and Broad streets in downtown New York City. Thirty people were killed instantly, more than 300 were injured, and eight later died from their injuries. The noise was heard throughout Lower Manhattan and across the East River in Brooklyn. The smoke-filled streets were covered with a layer of shattered glass, debris from the damaged buildings, and bodies. The chief clerk of J.P. Morgan, William Joyce, who had been seated near the front window, was among those killed, and Junius Morgan, a son of J.P. Morgan, Jr., was wounded. The New York Stock Exchange, across Broad Street, was closed immediately.

The police and soldiers called in from Governors Island helped the injured, guarded the scene, and searched for evidence. The investigation ultimately confirmed that a bomb made with TNT and packed with iron window sash weights had caused the carnage and that it had been detonated by a timer after the perpetrators left the scene.

Because nobody claimed responsibility for the bombing, the New York Police Department considered a number of possible motives. The assassination of J.P. Morgan, Jr., was dismissed as a motive because he was in Europe at the time of the attack. Another possibility was an attempt to rob the adjacent Sub-Treasury Building, where $900 million in gold bars was being moved that day. The bombing was ultimately decided to have been an act of terrorism performed by “Reds”—anarchists and communist sympathizers—who wanted to shatter the symbols of American capitalism. A stack of anarchist flyers found in a mailbox a block away from Wall Street supported this theory. Suspicion fell on political radicals, communists, and anarchists of foreign origin—particularly Italians, Russians, and Jews. Although detectives visited every sash-weight manufacturer and dealer in the United States, as well as 500 stables in towns along the Atlantic coast, they had no success in finding the perpetrators.

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One suspect was Edwin P. Fischer, a lawyer, champion tennis player, and frequent inpatient in mental hospitals. In correspondence with friends and in conversations with strangers, he had predicted an explosion on Wall Street in mid-September. On September 16, however, he was in Canada, and his premonition was interpreted by investigators as a delusion that came true by coincidence. Another suspect was an Italian, Pietro Angelo, who was connected to a 1919 bomb plot. Pietro produced an alibi, but he was deported to Italy nonetheless. The Secret Service and the Federal Bureau of Investigation interrogated thousands of people and arrested many radicals, but no one was charged with the crime, and the investigation was dropped in 1940. No memorial was created to commemorate the event, and the facade of the damaged building, at 23 Wall Street, was not repaired.