The perpetrators of the string of bomb blasts in Ahmedabad struck with such impunity that even hospitals where the blast victims were being rushed for treatment were targetted.

Two explosions occurred at the Civil and the LG Hospital in the second cycle after a short pause when 14 bombs went off in the space of 60 minutes.

A doctor at Ahmedabad Civil hospital said a blast occurred near the trauma centre of the civil hospital, exacerbating the already tense situation.

"This blast killed nearly 15 people and injured around 40," said Dr Atul Vaid.

Some reports said four city hospitals were targetted.