Harrods had been the target of other IRA bombings . On the 18 August 1973 two fire bombs exploded causing slight damage , again on 21 December 1974 another fire bomb was placed in the north-east corner of the first floor . There was a very short warning and the store was in the process of being cleared when it exploded . 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 )
1993 Harrods bombing
1993 Harrods bombing
Harrods bombing