Osama bin Laden's al Qaeda network planned to attack the United States naval base at Pearl Harbor, Hawaii, using hijacked airliners, The Washington Times reported on Monday.

　　The potential targets included nuclear powered submarines and ships, the newspaper said.

　　The newspaper said officials pointed to the intelligence reports as a factor in the U.S. government's decision earlier this month to raise the terror threat level to orange, or "high" risk of attack.