The e-mail, forwarded yesterday by one Ajay Kashyap to the chief secretaries of Rajasthan, Delhi and few other states, claimed that a man from Bihar was planning to trigger blasts in Delhi on August 15, state intelligence sources said.
The e-mail also contained specific details of the man, it claimed, would carry out the blasts, they said.
Efforts are on to trace the source of the e-mail and the sender's identity.