A top South Korean financial regulator has launched a probe into domestic crypto staking services. And crypto exchanges are concerned this means new staking-related regulations could be incoming.

The media outlet News1 reported that the Financial Supervisory Service (FSS) has “recently requested” that some of the country’s top exchanges cooperate with an investigation into their staking operations.

At least three of the nation’s four biggest exchanges – Upbit, Bithumb, Korbit, and Coinone – confirmed that they had been contacted by the FSS recently regarding staking, News1 claimed.

An unnamed official at one of the exchanges said that the FSS had sent the trading platform “a request for data related to staking services.”An employee at another of the three exchanges stated that they had sent FSS staking-related data “in the third week of February” this year.

The FSS did not comment on whether or not staking regulations would be forthcoming. But a spokesperson admitted that the regulator was making inquiries on the matter. The regulator suggested that an outright ban on domestic staking was not currently being considered.