Idea is to reduce economically-crippling imports of the yellow metal.

The two-century-old Shree Siddhivinayak temple in Mumbai devoted to lord Ganesha bristles with close circuit cameras and is guarded by 65 security officers.

It is one of India’s richest temples, having amassed 158 kg of gold offerings, worth some $67 million, and its heavily guarded vaults are strictly off limits.

India is the world’s biggest consumer of gold and its ancient temples have collected billions of dollars in jewellery, bars and coins over the centuries -- all hidden securely in vaults, some ancient and some modern.

A few years ago a treasure of gold worth an estimated $20 billion was discovered in secret subterranean vaults in the Sree Padmanabha Swamy temple in Kerala.

Now, the Narendra Modi government reportedly wants to get his hands on this temple gold, estimated at about 3,000 tonnes, more than two-thirds of the gold held in the U.S bullion depository at Fort Knox, Kentucky, to help tackle India’s chronic trade imbalance.

The Modi government is planning to launch a scheme in May that would encourage temples to deposit their gold with banks in return for interest payments, it is said.

The government is likely melt the gold and loan it to jewellers to meet an insatiable appetite for gold and reduce economically-crippling gold imports, which accounted for 28 per cent of India’s trade deficit in the year ending March 2013.

India’s annual gold imports of 800 to 1,000 tonnes could be cut by a quarter if temples decided to participate in the scheme, say government and industry sources. “We would be happy to deposit our gold to nationalised banks if the policy is beneficial, safe and earns good interest,” said Narendra Murari Rane, chairman of the trust for the Siddhivinayak temple, portions of which are gold-plated.

But some Hindu devotees are not happy with the idea that their offerings could be melted down.

A Mumbai-based gold merchant, who said he and his father had donated 200 kg of gold to Siddhivinayak and other temples over the years, said it would be a sin for the temples to earn interest on the gold offered to the gods. “I make donations to God; not to any temple trust,” the 52-year-old merchant said. Mr. Modi would also like to convince Indians to open their family vaults, which hold an estimated 17,000 tonnes of gold in jewellery and other heirlooms.

But it will be much harder to convince Indian families, who sometimes have little faith in financial institutions, to break tradition and hand over gold passed down the generations.