Jim Cowie

North Korea's Internet was on the fritz for a second day on Tuesday. But the US is staying silent on whether it launched a cyber attack as payback for the hacking of Sony Pictures.

Key North Korean websites suffered intermittent outages on Tuesday after a nearly 10-hour shutdown that followed a U.S. vow to respond to a crippling cyberattack on Sony Pictures that Washington blames on Pyongyang.

North Korea's Internet was on the fritz for a second day on Tuesday. But the US is staying silent on whether it launched a cyber attack as payback for the hacking of Sony Pictures.

Key North Korean websites suffered intermittent outages on Tuesday after a nearly 10-hour shutdown that followed a U.S. vow to respond to a crippling cyberattack on Sony Pictures that Washington blames on Pyongyang.