The FBI recovered “top secret” and even more sensitive documents from former President Donald Trump’s Mar-a-Lago estate in Florida, according to court papers released Friday after a federal judge unsealed the warrant that authorized the sudden, unprecedented search this week.

A property receipt unsealed by the court shows FBI agents took 11 sets of classified recordsFBI agents from the estate during a search on Monday.

The seized records include some marked not only 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 U.S. interests. The court records did not provide specific details about the information the documents might contain.

The warrant says federal agents were investigating potential violations of three different federal laws, including one that governs gathering, transmitting, or losing defense 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.