Detained Columbia University graduate student Mahmoud Khalil will remain in federal immigration custody a while longer.

Detained Columbia University student Mahmoud Khalil remains in ICE custody despite his green card status. Khalil is appearing before a judge today. This comes as Secretary of State Marco Rubio says 300 student visas have been revoked.

Lawyers for Mahmoud Khalil, the Columbia graduate student and pro-Palestinian activist detained by ICE, are fighting to keep his case in N.J.

Mahmoud Khalil, a Columbia University graduate student and legal U.S. resident, is fighting deportation after being detained by immigration officials over his role in pro-Palestinian campus protests.

Mahmoud Khalil's attorneys said they were prepared to argue for his release, but Judge Michael Fabiarz said, "I'm not going to handle any motion until I decide this is the court with the power to decide it.

ABC News’ Aaron Katersky reports on the legal showdown between the Justice Department and lawyers for a detained Columbia University graduate.

The government wants the detainee’s case heard in Louisiana, where an appellate judge may be friendlier. At a hearing in Newark, one of his lawyers called the situation “Kafkaesque.”

Speaking outside the U.S. Federal Court in Newark, New Jersey, Baher Azmy said he was hopeful the judge would move quickly on a decision on whether the case should be heard in the state rather than in Louisiana,

Columbia University student Mahmoud Khalil will remain behind bars in Louisiana at least until a U.S. judge decides whether the Palestinian activist should challenge his imprisonment in a federal court there or in New Jersey.