Prosecutors have agreed to plea agreements with three of the masterminds of the Sept. 11 terror attacks who were awaiting trial in Guantanamo Bay, Cuba, the Department of Defense said Wednesday. 

The Convening Authority for Military Commissions, Susan Escallier, entered into pretrial agreements with Khalid Shaikh Mohammad, Walid Muhammad Salih Mubarak Bin 'Attash, and Mustafa Ahmed Adam al Hawsawi, the DOD said. 

The terms and conditions of the plea deals were not disclosed. 

The three men, along with Ali Abdul Aziz Ali and Ramzi Bin al Shibh, were initially charged jointly and arraigned on June 5, 2008, and then were again charged jointly and arraigned a second time on May 5, 2012, in connection with their alleged roles in the attacks.