In a daring heist, thieves dug up a 125-feet-long tunnel to a bank in Sonepat district and broke into 77 lockers decamping with cash, jewellery and other valuables.

Though police and bank officials were yet to give an estimate of valuables stolen from the Gohana branch of Punjab National Bank, it is expected that the stolen cash and jewellery would be worth crores.

The incident came to light on Monday morning when the bank was opened after a holiday by its manager Devender Malik, police said. They suspect the robbery was carried out on the intervening night of Saturday and Sunday.

The tunnel to the bank was dug up from a nearby unoccupied house, police said, adding that a special investigation team has been set up to probe the robbery.

Police have registered a case under relevant sections of the IPC in connection with the incident, but so far have not managed to achieve any breakthrough.

According to Sonepat’s Superintendent of Police Arun Nehra, the thieves cleaned up 77 of a total 350 lockers at the bank.

He blamed the bank authorities for not following proper norms mandatory for the storage place where lockers are kept.

“The job of the thieves was made easy as the floor of the locker room was an ordinary cement floor commonly seen in houses and it was easily punctured by the robbers.

“As per the norms, it should have been built up of a thick RCC and steel plates and other reinforcements should have been there, which would have made it difficult or impossible for the miscreants to break—in,” Mr. Nehra said.

Refuting the charges, bank manager Malik said, “We have followed the RBI guidelines. The floor was eight to nine inches in depth. Even the walls were built of solid concrete.”

Mr. Malik said it appears the robbery was carried out after meticulous planning by the robbers, which may have stretched over several days.