Delhi Police has constituted three teams comprising 200 policemen to investigate the September seven high court bomb blast case.
The teams, under Deputy Commissioner of Police (Crime) Ashok Chand, will also interact with the National Investigation Agency which has been entrusted with the probe of the blast case, Delhi Police Commissioner B K Gupta said on Friday.
Meanwhile, sources said the police received an e-mail on Thursday night purportedly sent by Indian Mujahideen claiming responsibility for the blast.
The police is also in the process of releasing a third sketch of a blast suspect, the sources said. According to the sources, the e-mail received on Thursday night has a code word which could be deciphered as Ahmedabad being the next target.
The blast has left 13 people dead and nearly 90 injured in the terror attack outside the Delhi High Court.