Delhi is beefing up security for the 19th Commonwealth Games to be held in October in the national capital. Delhi Police has identified 500 vital installations and sites in the national capital as sensitive to terror attacks after carrying out a detailed security audit. <br/> <br/>The sites under high risk category include Connaught Place, Akashwani Bhavan, Lajpat Nagar market, South Extension, Qutab Minar, All India Institute of Medical Sciences, Dilli Hatt, New Delhi Railway Station and Delhi University campus. <br/> <br/>City's lifeline Delhi metro is also among the possible target of terrorists. The concerned personnel have been advised to beef up security arrangements by installing surveillance equipments and posting armed guards to ensure that no untoward incident happens during the 14 day event.<br/>