WOODBURY - U.S. counterterrorism officials tell the Associated Press that Osama bin Laden used flash drives and couriers to avoid leaving digital fingerprints on his emails.

The terror mastermind did not have Internet connection at his compound.

Instead, officials say bin Laden would type e-mails on the computer, save them on a flash drive and his couriers would take them to Internet cafes.

The couriers would also copy incoming messages onto a flash drive then take them back to bin Laden.

Navy SEALs seized about 100 flash drives during the raid that killed bin Laden.