Whodunit?

The USIS in Kolkata turned into a virtual fortress after four motorcyle-borne terrorists shot dead four policemen and injured several others early on Tuesday. Three groups have claimed responsibility for the attack so far : The Bangladesh-based Harkat-ul-Jehadi-Islami, the little-known Asif Rezak Commando and the Dubai-based mafia don Farhan alias Aftab Malik.

Photograph: Saab Press

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