However, the case was cracked before the Delhi Police team reached Sonepat with the arrest of two persons and recovery of jewellery weighing 10 kg from them by the local police.
"The modus operandi of this bank robbery was unique and pulled off with amazing precision. This invoked our curiosity and we had sent a team to look into the matter," said a senior Delhi Police official.
"Our Rohtak counterparts told us that they were flooded with calls from the security establishments from across the country. People talked about GPS and lasor-guided technology being used to dig the tunnel with such precision. But investigators there believed that it was the handiwork of local gangs and that is what it came out to be," the official said.
They dug the entire 125-feet long underground tunnel based on their judgment without using any modern gadgets, he added quoting senior officials in Rohtak.
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Cash and jewellery, worth crores of rupees, were stolen from the bank's Gohana branch in Sonepat, about 200 kms from here, on the intervening night of Saturday and Sunday and the incident came to light on Monday.
The robbers had dug a 125-feet-long and 2.5 feet wide tunnel to the bank from an house, lying unoccupied for past 4-5 years, to carry out a Bollywood style heist.
In another related development, the owner of the abandoned house, through which a 125-feet-long tunnel was dug to the Punjab National Bank locker room, allegedly committed suicide after consuming some poisonous substance soon after he was booked, police said.