The Securities and Exchange Board of India has barred Jane Street Group from accessing the country’s securities market, Bloomberg News reported on Thursday, citing an order the regulator posted on its website.

SEBI said that Jane Street Group entities “are restrained from accessing the securities market and are further prohibited from buying, selling or otherwise dealing in securities, directly or indirectly.”

Banks have been directed to ensure no debits are made without SEBI’s permission in respect of the accounts held individually or jointly by the entities, according to the order.

SEBI has been investigating Jane Street’s derivatives trades after some market participants alleged manipulation by the US firm. Jane Street generated more than $2.3 billion in net revenue from equity derivatives last year in India.