In the wake of the terror attack on Amarnath pilgrims in Kashmir, the Delhi Police issued an advisory to its officers to step up security on routes being used by kanwars (devotees of lord Shiva) to enter the national capital. 

Police sources said the advisory, issued by the Special Cell, stated that security should be stepped up at important and vulnerable places in  Capital. 

Sources said security personnel had been put on duty at important public facilities like Delhi Metro and Indira Gandhi International Airport in addition to other crowded areas like market places, railway stations, interstate bus terminals and  establishments of strategic importance. 

The advisory stated that special anti-terror measures were advised for the Kanwar Yatra which began on Monday and will conclude on 21 July. It sought adequate security arrangements at points of halt with support from quick response teams. 

According to reports, special attention has been paid to security in north and northeast Delhi, which are main areas through which Kanwars travel.

"The national capital is always at the target of terror groups. With the Amarnath terror attack and the Kanwar Yatra, the vigil has been heightened," said a senior police officer. 

He added that the advisory has  been issued also keeping in the mind that Independence Day was just over a month ahead. 

Sources said special security would be in place at popular market places in South and Central Delhi besides the VIP movement zone in Lutyen's zone. In order to deal with an emergency, local police were also told to remain extra vigilant, they added.