Kenya’s Ministry of the Interior suspended the operations of Worldcoin, the identity crypto protocol co-founded by OpenAI’s Sam Altman, according to a statement posted on the ministry’s Facebook page on Wednesday.

“The Government is concerned by the ongoing activities of an organization calling itself ‘WORLD COIN’ which is involved in the registration of citizens through the collection of eyeball/iris data,” said the statement signed by Minister Kithure Kindiki. Relevant financial, security and data protection services have started investigations to establish the legitimacy and data protection of the project.

Worldcoin is attempting to create a global identification mechanism based on iris scans, which can be used to prove that an agent is human and unique. In a world where artificially intelligent agents are participating in the economy, this could be crucial, the project says.

But the collection of biometric data as well as the signup process in developing countries have drawn criticism, including accusations of exploitation. Users that have had their irises scanned have received WLD tokens since the project’s launch last week. The token has risen 1.9% to $2.38 on crypto exchanges in the past 24 hours, according to CoinMarketCap data.

Several European regulators have also started investigations into Worldcoin, among them the Bavarian data protection office that supervises the firm, according to a statement sent to CoinDesk.

Worldcoin had not responded to CoinDesk’s request for comment by the time of publication.

UPDATE (Aug. 2, 07:52 UTC): Adds token performance in fourth paragraph.