Altogether nine people have been injured when a powerful bomb exploded in Tezpur town at around 2-30 on this afternoon. Three of them are in critical. According to information, the blast took place at Bargola, at a distance of 100 meter away from the Tezpur Police station. Eyewitness say the bomb was planted at a bicycle. The injured people have been rushed to hospital. Police and civil officials are there in the spot. But no lead has been achieved so far. Details are awaited.