WASHINGTON (AP) — The Justice Department on Monday rebuffed efforts to make public the affidavit supporting the search warrant for ex-President Donald Trump’s estate in Florida, saying the investigation “implicates highly classified material” and the document contains sensitive information about witnesses.

The Government’s opposition came in response to court filings by several news organisations, including The Associated Press, seeking to unseal the underlying affidavit the Justice Department submitted when it asked for the warrant to search Trump’s Mar-a-Lago estate earlier this month.

Trump, in a Truth Social post early Tuesday, called for the release of the unredacted affidavit in the interest of transparency.

The court filing — from Juan Antonio Gonzalez, the US attorney in Miami, and Jay Bratt, a top Justice Department national security official — argues that making the affidavit public would “cause significant and irreparable damage to this ongoing criminal investigation”.

The document, the prosecutors say, details “highly sensitive information about witnesses” — including people who have been interviewed by the Government — and contains confidential grand jury information.

The Government told a federal magistrate judge that prosecutors believe some additional records, including the cover sheet for the warrant and the Government’s request to seal the documents, should now be made public.

A property receipt unsealed Friday showed the FBI seized 11 sets of classified documents, with some not only marked “Top secret” but also “Sensitive compartmented information”, a special category meant to protect the nation’s most important secrets that, if revealed publicly, could cause “exceptionally grave” damage to US interests. The court records did not provide specific details about information the documents might contain.

The Justice Department acknowledged Monday that its ongoing criminal investigation “implicates highly classified material”.

The search warrant, also unsealed Friday, said federal agents were investigating potential violations of three different federal laws, including one that governs gathering, transmitting, or losing defence information under the Espionage Act. The other statutes address the concealment, mutilation or removal of records, and the destruction, alteration or falsification of records in federal investigations.

The Mar-a-Lago search warrant, carried out last Monday, was part of an ongoing Justice Department investigation into the discovery of classified White House records recovered from Trump’s home earlier this year. The National Archives had asked the department to investigate, after saying 15 boxes of records it retrieved from the estate included classified records.

It remains unclear whether the Justice Department moved forward with the warrant simply as a means to retrieve the records, or as part of a wider criminal investigation, or as an attempt to prosecute the former president. Multiple federal laws govern the handling of classified information — with both criminal and civil penalties — as well as presidential records.

But the Justice Department, in its filing Monday, argued that its investigation is active and ongoing and that releasing additional information could not only compromise the probe but also subject witnesses to threats, or deter others from coming forward to cooperate with prosecutors.

“If disclosed, the affidavit would serve as a road map to the Government’s ongoing investigation, providing specific details about its direction and likely course in a manner that is highly likely to compromise future investigative steps,” the Government wrote in the court filing.