The U.S. military has formally ordered a military tribunal for five suspected al-Qaida militants, believed to have planned the September 11, 2001, terrorist attacks against the United States that killed nearly 3.000 people.

Pentagon officials said Wednesday the self-proclaimed mastermind of the 9/11 attacks, Khalid Sheikh Mohammed, and four other alleged co-conspirators are accused of terrorism, hijacking aircraft, conspiracy, murder and other charges. They could face the death penalty, if found guilty.

In a statement Wednesday, the U.S. Defense Department said the defendants are due in court within 30 days. The trial will be held at the U.S. naval base in Guantanamo Base, Cuba.