A federal magistrate judge in Washington wants to hear from Twitter Inc. and Yahoo! Inc. before ruling on a request by federal prosecutors to block those companies from disclosing information on grand jury subpoenas.

In two orders issued on March 21, U.S. District Magistrate Judge John Facciola said he received applications from the government asking that Twitter and Yahoo be barred from “notifying any person of the existence or content of” the grand jury subpoenas.