Puerto Rico ? The U.S. military prepared new charges Friday against three of the best-known detainees at Guantanamo Bay – a key step toward resuming the military tribunals for terrorism suspects that were halted by the U.S. Supreme Court last year.

Authorities drafted new charges – including murder, conspiracy and providing material support for terrorism – against Canadian Omar Khadr, Australian David Hicks and Salim Ahmed Hamdan, of Yemen, said Air Force Col. Morris Davis, chief prosecutor in the Guantanamo war crimes trials.

Under military rules, the charges are not considered formally filed against the detainees until they are approved by a U.S. Department of Defense legal adviser and another official who oversees the tribunals.