"The incident took place at around 12 noon when the van owned by CMS cash collection company was intercepted by a white Honda City car near B L Kapoor hospital at Ravidas Marg.
"Two people on a bike, who were probably following the cash van, also reached the spot and held the guard, custodians and the driver at gun-point.
"Meanwhile, four people alighted from the car, opened the hatch and shifted the cash trunk to their car. The cash trunk had approximately Rs 15 lakh," said a senior police official.
The two assailants left their bike on the spot and all of them fled in the car. The guard fired one round from his 12 bore gun when the assailants were escaping but the bullet missed the target, police said.
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A CMS official later told PTI that the cash trunk had Rs 12 lakh. The van was coming after collecting cash from the Life Insurance Corporation and the Delhi Jal Board offices.
According to a senior police officer while fleeing the car had also hit another vehicle but the assailants did not stop. Later, they abandoned the car at Pusa road. Their trail from here is unclear. We have impounded the two vehicles and the arm which was left behind in the cash van during the scuffle.
Police are questioning the occupants of the cash van and verifying their claims from the company officials and local CCTV footage, police said.
The incident comes close to the heels of a string of such loots in the city. The last such loot was reported on October 28 when four armed unidentified men had robbed off Rs 88 lakh from a cash collection van in Damodar Park area of Dilshad Garden in East Delhi. Police are yet to make any major breakthrough in the case.