President Donald Trump’s office could be held in contempt of court for failing to comply with a subpoena issued in May requiring all classified documents in his possession be returned, according to reports.

The Washington Post reported on Thursday that individuals associated with the matter spoke on anonymity while describing the court proceedings.

The individuals told the Washington Post that Justice Department lawyers requested U.S. District Court Judge Beryl A. Howell hold the former president’s office in contempt of court, though no action has been taken on the request.

The Washington Post reported that the DOJ’s continued frustration with Trump’s team came to a head in June when his lawyers gave their assurance that the Mar-a-Lago residence had been thoroughly searched.

In August, nearly two months later, FBI agents executed a search warrant at Trump’s Mar-a-Lago home in Florida, resulting in classified documents in his possession.