Investigators have prepared a sketch of a suspect they want to question over the three deadly bomb blasts that shook India's financial hub Mumbai, police said Sunday. The drawing composed from eyewitness accounts would be circulated among officials investigating the blasts but would not immediately be released to the public, a police official said on condition of anonymity as he was not authorized to speak to the media. Meanwhile, a man picked up by police for questioning in connection with the blasts died Sunday in Chembur, a Mumbai suburb. Faiz Usmani's family alleged that he was tortured during the interrogation. Police denied the charge but ordered an investigation. “He was brought for questioning by the Chembur unit of Mumbai police. He was suffering from hypertension. The allegations of torture by police are absolutely untrue,” said Nisar Tamboli, a police spokesman.