Sharma visited Qutab Minar at around 11:30 am and sources said he was 'not satisfied' with the security arrangements in and around the monument, a masterpiece of Mughal architecture and a UNESCO World Heritage site.
The Minister also visited Red Fort and is likely to visit a number of other tourist sites.
Security has already been enhanced in the national capital following the pre-dawn attack by a group of heavily-armed Pakistani terrorists on an Air Force base in Pathankot. At least three security personnel were killed along with four attackers in the gun-battle.
Security was significantly heightened at the airport, railway stations, bus stands and other vital installations in the city. Vigil was enhanced in several areas including popular market places of South Delhi, Central Delhi and the VIP movement zone in Lutyen's Delhi, a senior police official said.

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