The speculation on the street is that it was a tit-for-tat assassination between rival gangs.

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Both India and Pakistan are proven nuclear powers after last year's tit-for-tat tests, and it is believed they may each possess a small number of nuclear warheads.

BBC: Nuclear clash came 'very close'

It was the latest in a string of tit-for-tat murders over the past few months that have placed strain on a ceasefire deal signed in 2002.

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Your report states that there was tit-for-tat violence, but the reality is that it was fairly quiet in the city at the time.

ECONOMIST: Provincial attitudes

Tehran said Wednesday it was temporarily recalling its ambassador from London, another move in escalating tit-for-tat gestures between the governments.

CNN: Violence flares again in Tehran