Six prominent IT companies in the city, including Infosys and Wipro, have received e-mails threatening to blow up their buildings, a top police officer said in Bangalore on Sunday.

Joint commissioner of police B Gopal Hosur said that the companies received e-mails threatening to blow up their establishments two days ago and immediately informed the police.

Capgemini and Accenture have also received threat mails.

The police have already begun investigations, he said, but did not divulge further details.

Security had been tightened at all the companies which received the threats.

Hosur said, "An email is doing the rounds which has been taken seriously and we have beefed the security for all the IT firms in the city and not taking anything lightly."

The police have already begun investigations, he said, but did not divulge further details. X