 The 1974 bomb was the work of the infamous Balcombe Street Gang who also carried out high-profile bombings in Knightsbridge, Piccadilly, Oxford Street, Woolwich, and many other locations in London and Surrey.It was also the target of a much smaller IRA bomb almost ten years later, in January 1993, which injured four people (see 1993 Harrods bombing).From 1973 the Provisional IRA had carried out waves of bombing attacks on commercial targets in London and elsewhere in England as part of its "economic war".