New York’s attorney general has a few questions for the Winklevoss twins.

State AG Eric Schneiderman said Tuesday it sent letters to 13 cryptocurrency exchanges, asking for information about their general operations, personnel, and policies around privacy, fraud and money laundering.

That includes the New York-based Gemini exchange founded by Cameron and Tyler Winklevoss, the Harvard-educated twins who famously tangled with Mark Zuckerberg over who founded Facebook.

“We look forward to cooperating with and submitting our responses to the questionnaire that has been circulated,” Gemini CEO Tyler Winklevoss said in a statement. “We continue to embrace thoughtful regulation and collaboration on our mission to help build the future of money.”

The probe comes as the Justice Department and the Securities and Exchange Commission are cracking down on the trading of digital currencies, including small and lightly traded ones that are minted through so-called initial coin offerings.

“With cryptocurrency on the rise, consumers in New York and across the country have a right to transparency and accountability when they invest their money,” Schneiderman said in a statement.

Bitcoin has also collapsed more than 50 percent from its peak of more than $19,200 in December to about $8,000 on Tuesday.

Similar virtual currencies, like Ether and Ripple, have also had volatile rides this year as governments around the world have cracked down.

In addition to Gemini, letters went to exchanges including Coinbase, bitFlyer, Bitfinex, Kraken, Binance, Gate.io and itBit.

In his letter to the exchanges, Schneiderman called the virtual currencies “a highly speculative sector, featuring significant volatility, instability, and risk.”

“Moreover, published reports indicate the sector has attracted fraudsters, market manipulators, and thieves,” Schneiderman wrote.