A 26-year-old IT expert has admitted sending email threatening Prime Minister Manmohan Singh and President APJ Abdul Kalam, with police blaming it on a failed love affair.
Kerala police chief Raman Shrivastava said Akbar Raj, arrested on Saturday evening, had "confessed to the crime. It has also been scientifically proved using digital technology with the help of Microsoft".
According to the police, a failed love affair led Raj to send the threatening email messages that sent the authorities in a tizzy.
"The real motive behind the email was a failed love affair with an engineering graduate," Shrivastava said.
The email, sent to top police officials, warned that the prime minister and president would be assassinated when they visit Kerala.
While Manmohan Singh is due to arrive Tuesday night, the president is slated to visit the state in December.
Akbar Raj works in a hardware company in Kochi and the cafe that he used to send the email was located near his office.
K Padmakumar, a deputy inspector general of police, said the email id was created from a cafe in Kochi and Akbar Raj was at the cafe Thursday from 2.15 to 4.30 pm during the time the message was sent.
"He had sent just one mail to 20 top police officials and the last line appeared to be a coded message. When we cracked the code, it lead to a village called Melavoor near Vaikom in Kottayam district. A police team located a girl who studied at Kochi. It came to light that the girl also had complained of malicious mail being sent to the office where she works," said Padmakumar.
"The girl and the arrested man used to chat on the Internet and were friends but had broken off. It was this that led Akbar Raj to devise measures on the computer to tarnish her," said Padmakumar.
"We are investigating whether the accused has any links with any terrorist organisation," said Inspector General of Police Loknath Behra, who was in charge of the case.