A few hours after police commissioner M N Singh told newsmen that terrorist organisations were making extensive use of the Internet for networking, unlike the underworld which still preferred mobile phones, Videsh Sanchar Nigam Ltd (VSNL) received an e-mail threatening to blow up all important installations in Delhi, Mumbai and Bangalore, besides airports, railway stations and hospitals. The e-mail, which was received by the VSNL and handed over to the police at 7.30 pm on Wednesday, was also sent to important organisations like the Bhabha Research Atomic Centre, various airlines, consulates, etc., joint commissioner of police (crime), B S Mohite told newsmen on Thursday. The e-mail text challenges the police to protect India, saying that a group of "freedom fighters" based in Mumbai, Delhi, Gulbarga and Jaipur will execute `operation chaos in India' anytime up to November 14. The e-mail was sent between 1.30 pm and 2.30 pm on Wednesday.