Karnataka Chief Minister B S Yeddyurappa and his ministerial colleagues have received threats to their lives through two e-mails sent to their official addresses.
The single sentence e-mails, carrying pictures of the Karnataka assembly building and a masked man with an AK-47 rifle, said, "We are going to kill the ministers in Karnataka, Bangalor (sic)."
The sender mentioned his name as 'Jihad, Pakistan'.
The police claimed that the e-mails were sent from a Gmail address carrying the name – Naveed.
Bangalore Police Commissioner Shankar Bidari said a case has been registered against unknown persons on Monday and efforts were on by the cyber cell to trace the sender.
Criminal Investigation Department (CID) sleuths were also investigating the matter.
The officials initially considered the threats as hoaxes intended to spread panic during the festival season. A formal complaint was later lodged at the Vidhan Souda Police station.
In a similar e-mail sent to the Bangalore Police in July, the sender had threatened to blow up the assembly building. The sender was arrested.
However, the police were unable to trace the culprits behind another e-mail received by the chief minister on September 22 last year.
The sender had threatened to explode chemical bombs at 15 places in the city.