U.S. federal agents were looking for documents relating to nuclear weapons during the dramatic raid of former President Donald Trump's Mar-a-Lago resort in Florida earlier this week, The Washington Post reported Thursday.

It was not clear if such documents were recovered at the former president's estate in Palm Beach, the Post said. Reuters could not immediately confirm the report.

The U.S. Justice Department asked a judge on Thursday to make public the warrant that authorized the FBI search of Mar-a-Lago, after Trump, a Republican, portrayed it as political retribution.

The request means the public could soon learn more about what investigators were looking for during the unprecedented search of a former president's home.

The search was part of an investigation into whether Trump illegally removed records from the White House as he left office in January 2021, some of which the Justice Department believes are classified.

Attorney General Merrick Garland, the top law enforcement officer and an appointee of Democratic President Joe Biden, told a news conference that he had personally approved the search. The Justice Department also seeks to make public a redacted receipt of the items seized.

"The department does not take such a decision lightly. Where possible, it is standard practice to seek less intrusive means as an alternative to a search, and to narrowly scope any search that is undertaken," Garland said.

His decision to publicly confirm the search was highly unusual. U.S. law enforcement officials typically do not discuss ongoing investigations in order to protect people's rights. In this case, Trump himself announced the search in a Monday night statement.

Garland said the Justice Department made the request to make public the warrant "in light of the former president's public confirmation of the search, the surrounding circumstances and the substantial public interest in this matter."

A source familiar with the matter said the FBI retrieved about 10 boxes from Trump's property during the search.

Trump was not in Florida at the time of the search.

Late on Thursday, Trump called for the immediate release of documents related to the search. "Not only will I not oppose the release of documents related to the unAmerican, unwarranted, and unnecessary raid and break-in of my home in Palm Beach, Florida, Mar-a Lago, I am going a step further by ENCOURAGING the immediate release of those documents, even though they have been drawn up by radical left Democrats and possible future political opponents, who have a strong and powerful vested interest in attacking me, much as they have done for the last 6 years," he said on his Truth Social platform.

Prominent attorney hired

Trump has hired a prominent Atlanta criminal defense attorney known for defending famous rappers to represent him in matters related to the special grand jury that's investigating whether the former president illegally tried to interfere with the 2020 election in Georgia.

Drew Findling's clients have included Cardi B, Migos and Gucci Mane, as well as comedian Katt Williams. His Twitter bio includes the hashtag #BillionDollarLawyer and his Instagram feed is filled with photos of him posing with his well-known clients.

His most recent Instagram post, dated two days after the U.S. Supreme Court overturned Roe v. Wade in late June, says his firm is committed to "fighting to restore a woman's right to choose, which has been destroyed by the Supreme Court," suggesting his personal views don't align with those of Trump's Republican Party. He offered to defend anyone charged under Georgia's restrictive abortion law free of charge.

After Trump insulted basketball star LeBron James's intelligence in an August 2018 tweet, Findling called Trump the "racist architect of fraudulent Trump University" in a tweet and ended the post with "POTUS pathetic once again!"

The Findling Law Firm said in a statement released Thursday that it has been hired, along with attorneys Jennifer Little and Dwight Thomas, to represent Trump.

Findling said in an emailed statement that he is a "passionate advocate against injustice" and will "strongly defend" Trump.

The government has until 3 p.m. (7 p.m. GMT) on Friday to let the court know whether Trump's attorneys will object to unsealing the warrant. The case is before U.S. Magistrate Judge Bruce Reinhart, who reviewed the warrant to ensure the Justice Department had sufficient probable cause for the search.

While seeking to unseal the warrant, the Justice Department has not asked the judge to unseal the sworn statement in support of the warrant, the contents of which could potentially include classified information.

Two of Trump's attorneys, Evan Corcoran and John Rowley, did not respond to a request for comment.

In a statement earlier on his Truth social network, Trump said: "My attorneys and representatives were cooperating fully, and very good relationships had been established. The government could have had whatever they wanted, if we had it."

On Wednesday, Trump had complained that he had been barred from re-entering his Florida resort home, suggesting FBI agents might be "planting" evidence.

Locked storage room

The unprecedented search marked a significant escalation in one of the many federal and state investigations Trump is facing from his time in office and in private business, including a separate one by the Justice Department into a failed bid by Trump's allies to overturn the 2020 presidential election by submitting phony slates of electors.

The investigation into Trump's removal of records started this year after the National Archives made a referral to the department.

Former Archivist David Ferriero has previously said that Trump returned 15 boxes to the government in January 2022. The archives later discovered some of the items were "marked as classified national security information."

A couple of months before the search, FBI agents visited Trump's property to investigate boxes in a locked storage room, according to a person familiar with the visit.

The agents and Corcoran spent a day reviewing materials, the source said. A second source who had been briefed on the matter told Reuters the Justice Department also has surveillance footage from Mar-a-Lago in its possession.

Garland's Justice Department has faced fierce criticism and online threats since Monday's search. Trump supporters and some of his fellow Republicans in Washington accuse Democrats of weaponizing the federal bureaucracy to target Trump.

In Cincinnati, Ohio, on Thursday, an armed man suspected of trying to breach the FBI building died following an exchange of gunfire with law enforcement officers, an Ohio State Highway Patrol official said.

Garland condemned the threats and attacks against the FBI and Justice Department. "I will not stand by silently when their integrity is unfairly attacked," he said.

Some Democrats have criticized Garland for being overly cautious in investigating Trump over his attempts to overturn his 2020 election loss to Biden.