(Reuters) – Investigators plan to pry open the final vault hidden deep under a centuries-old Indian Hindu temple as police guarded round the clock the shrine where billions of dollars worth of treasure has been discovered.

Over the last week a seven-member team of investigators has broken into five of the six secret subterranean vaults piled high with jewels that have lain untouched for hundreds of years.

Onlookers and devotees thronged the shrine in the bustling centre of Thiruvananthapuram, the capital of India’s southern Kerala state, as officials said treasure worth more than $20 billion had been found — more than India’s education budget.

Sacks filled with diamonds were piled next to tonnes of gold coins and jewellery, media reported, in the vaults of the 16th century Sree Padmanabhaswamy temple, the royal chapel of the former rulers of Travancore, now part of Kerala state.

“The current market value of the articles found so far by the committee members would be roughly 900 billion rupees,” one temple official who was not authorised to speak to the media told Reuters.

Investigators searched the vaults to draw up an inventory of the riches because of worry about security but they had no idea of the amount of treasure they would find.

Estimates of the haul’s worth range across billions of dollars, with investigators unwilling to disclose the official amount and the ambiguity involved in valuing the priceless jewels and gold coins by weight.

Police set up a dedicated control room close to the temple on Monday, as state Chief Minister Oommen Chandy pledged full state security for the hoard and promised it would remain the property of the temple after an inventory was made.

“We are ready to protect the temple wealth. We will chart out measures for the permanent security in consultation with the Travancore Royal family, which administers the temple now, and the chief priest of the temple”, Chandy told reporters.

Historians supported the estimates of the treasure’s value, noting the lucrative trade routes that passed through the region for many centuries.

“Traders, who used to come from other parts of the country and abroad for buying spices and other commodities, used to make handsome offerings to the deity for not only his blessings but also to please the then rulers”, said P.J. Cherian, director of Kerala Council for Historic Research.

As estimates of the treasure’s worth rise, a fierce debate is growing regarding what to do with the discovery, in a country where 450 million people live in poverty.

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