IT-giant Wipro received an anonymous email threat demanding Rs 500 crore worth currency in bitcoins as ransom, failing which a lethal drug would be spread on their Bengaluru campus, the New Indian Express reported.

As per the report, Wipro, which registered a complaint with cyber-crime cell of the police, received the email on Friday morning. The anonymous sender also threatened to use the drug if they failed to pay. Bitcoin is a digital encrypted currency.

The email sent by the individual, according to police sources, claimed that one kg of Ricin has already been stored and two grams would be sent in envelopes to one of Wipro’s offices to assure that the threat is not a fake.

Ricin in a natural toxic protein which is an extract of castor bean from the castor plant. A table spoon of high quality Ricin can kill an adult within a few hours.

In a statement, Wipro said confirmed that they have filed a complaint with the local law enforcement authorities after receiving a threatening letter from an unidentified source. “Wipro has augmented security measures at all its office locations. There is no impact on the company's operations. We have no further comments as the investigation is ongoing,” the statement said.

Cyber police have registered the case under Section 66 F of the IT Act (cyber terrorism) and investigations are underway.