Two days after the high intensity blast at the Delhi High Court, investigators were groping for a breakthrough even as Home Minister P Chidambaram today said there were "promising" but not "very conclusive leads" in the probe and agencies of foreign countries had also been roped in.
On a day a third email purportedly sent by Indian Mujahideen was received by Delhi Police, Chidambaram did not rule out cross-border connection, saying, "at this moment, every organisation is suspect" and he was "keeping fingers crossed till we have evidence".
The IM claiming responsibility for Wednesday's blast that left 13 dead and over 80 injured, also warned the Government of another attack "that will be so cruel that you people will not be able to forget it" for 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 questions because we don't have time for anything," the sources said, quoting the e-mail.
The sources said the code numbers used by them can be interpreted as Ahmedabad.
Addressing a press conference here, Chidambaram said the e-mail was "amateurish in nature" and code mentioned by them could be decoded in minutes.
A person, suspected of sending e-mail immediately after the blast, has been taken in for questioning in Kishtwar in Jammu and Kashmir. "We have to wait for that report to come," Chidambaram said.
Amid concerns over security in the Supreme Court, Prime Minister Manmohan Singh stepped in and directed urgent steps to beef up protective measures in the complex.
He asked Chidambaram and Law Minister Salman Khurshid to call on Chief Justice of India S H Kapadia and take "urgent steps" to further strengthen the security arrangements.