It's the latest development in the U.S. military's struggle to bring to justice the man charged with planning the Sept. 11 attacks on the United States.

The Biden administration succeeded Thursday in temporarily blocking accused 9/11 mastermind Khalid Sheikh Mohammed from entering a guilty plea in a deal that would spare him the risk of execution for al-Qaida’s Sept.

The Biden administration has doubled down on its unusual court battle to derail a plea deal that the government itself had reached with accused 9/11 mastermind Khalid Sheikh Mohammed.

The move comes after years of legal battles over the case, which remains in pretrial hearings 17 years after charges were first filed.

The Biden administration asked a federal appeals court on Tuesday to block a plea agreement for accused 9/11 mastermind Khalid Sheikh Mohammed that would spare him the risk of the death penalty in one of the deadliest attacks ever on the United States.

The Biden administration is asking for a federal appeals court to temporarily block a plea deal agreement with three detainees in Guantanamo Bay, Cuba.

Defense Secretary Lloyd Austin had sought to withdraw agreements with Khalid Sheikh Mohammed and two others charged in the Sept. 11, 2001, attacks.

Defense Secretary Lloyd Austin and the Biden administration are attempting to block the deal to pursue capital punishment.

The Justice Department, on behalf of the Pentagon, on Tuesday asked an appeals court to block an effort to enforce plea deals reached with four accused conspirators of the Sept. 11, 2001, terrorist attacks.