BEIJING - An Internet outage that cut North Korea from the Web ended after more than nine hours Tuesday.

The outage, which began about 1 a.m. local time, shut down the two government media outlets, the Korean Central News Agency and the Rodong Sinmun newspaper. Both were back online shortly before 11 a.m., with the Rodong Sinmun featuring photos of the country's leader, Kim Jong Un, visiting a catfish farm.

China's Xinhua news service on Tuesday quoted an unnamed Chinese official as saying that it may have been a systems failure.

The outage came just two days after President Obama promised a "proportional response" against North Korea, which the United States has accused of hacking into the computers of Sony.