U.S. District Judge Lewis Kaplan of the Southern District of New York on Wednesday ordered FTX founder Sam Bankman-Fried not to communicate with current or former employees of FTX and Alameda after prosecutors expressed alarm about Bankman-Fried’s communications with FTX U.S. General Counsel Ryne Miller.

Kaplan scheduled a hearing to discuss the proposed new bail conditions for Feb. 7, but in the interim he approved the government’s request to block Bankman-Fried from communicating with his former colleagues outside the presence of counsel and to bar him from using “any encrypted or ephemeral call or messaging application, including but not limited to Signal.”