Consequent to Delhi High Court bomb blast on Wednesday, foue e-mails have been received so far. Two emails claiming responsibility for the Delhi High Court blast were sent to Delhi Police on Friday.

One of the mails is apparently from the terror group Indian Mujahiddeen and originated from Moscow. It claims Ahmedabad will be the next target. The email offers a code that warns of the next attack. "The numbers read as Ahmedabad," said Home Minister P Chidambaram, who described the contents of the email as "simple amateurish code" but stressed, "We are taking it seriously... the Gujarat government has been alerted."

All emails are being carefully studied by the National Investigating Agency (NIA) which has been asked to handle the inquiry into the latest terror attack in Delhi. The first was received by NDTV and another TV channel on Wednesday and was purportedly from terrorist group HuJI or Harkat-ul-Jihad-al-Islami. That note said that the Supreme Court would be attacked next if the death sentence for Afzal Guru is not commuted. Mr Guru has been convicted for the 2001 attack at the Indian Parliament. The email was traced to a cybercafe in Kishtwar near Jammu; the sender is believed to be in his teens; a sketch of his will be released today.

A second email was sent to a TV channel yesterday; the sender claims to be a member of the Indian Mujahideen, but sources say the email, written in Hindi, does not follow the pattern of earlier emails sent by the IM claiming responsibility for terror attacks. This email has yet to be traced. The NIA has asked Google for assistance.

The third email, discussed today by Mr Chidambaram, is sent from an account named "killindian@yahoo" and reads, "This is to inform you that we Indian Mujahideen claims the terror attack on Delhi High Court. I just want you to pass a message to the Indian government that next blast will be so cruel that you people won't be able to forget it for decay (decades) and if you are willing to know the next attack it is 1,8,5,13,4,1,2,1,4 till you come to know what it stands for the next blast will be done if you have any question get back soon because we don't have time for anything. Ali Saed el-Hoori." The fourth email was sent from an account named "Chhotu mian" also threatens of an attack in Ahmedabad.