Sources in the Home Ministry say the explosions in Dilsukhngar, which began just after 7 pm, appear to be a strike by "a well-trained" group which timed the explosions to cause the maximum damage.
The explosions took place at rush hour near the popular Konark cinema, an elevated bridge used by pedestrians, and a bus stand in Dilsukhnagar, which has a large fruit and vegetable market. The first explosion happened at 7.01 pm, the second five minutes later at 7.06 pm and the third a little later.
Officials were finding it tough to clear the packed area which has a maze of narrow lanes. Cellphone networks have been jammed in and around Dilsukhnagar to prevent false information from being disseminated.
Delhi and Mumbai have been put on high alert.
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