The federal judge presiding over the case against five former Memphis officers convicted in the fatal beating of Tyre Nichols recused himself Friday, just days before he was supposed to hand down sentences for the men.

U.S. District Judge Mark S. Norris issued a one-sentence order saying he was recusing himself and “returns the matter to the Clerk for reassignment to another United States District Judge for all further proceedings.”

He offered no further explanation. Norris’ clerk did not immediately respond to a request for comment, and the U.S. Attorney’s Office declined comment Friday.

Several motions had been filed under seal in recent days. It was not clear if any of those asked for Norris to step away from the case. It is unusual for a judge to recuse themself from a case between the trial and sentencing.