After being tipped off by a note from the bomber, police urgently searched the station for a bomb. They found it and made it safe.

Over the next five months, bombs were found in New York City at the Public Library and at the Grand Hotel.

After his 1950 attacks he went on to injure two people at the Radio City Music Hall in 1954. In 1955, the Mad Bomber hit Grand Central Station, Macy's and the RCA building. His bomb on the Staten Island Ferry injured 7.

The Mad Bomber turned out to be a disgruntled employee of Con Edison, New York's electric utility company. His name was George Peter Metesky and he had resorted to terrorism, initially against the Con Edison, after the company refused to pay him any disability benefits after he suffered an accident whilst he was an employee at the company.

He was only found after the utility company searched its records for ex-employees and came across him.

He was eventually apprehended and sent to a mental institution in 1957. He was released in 1973.