SEOUL, Jan. 16 (Yonhap) -- North Korea is responsible for last year's cyber attack on a Seoul newspaper that crippled its server and Web site, South Korean police said Wednesday.

The National Police Agency (NPA) said the hacking method and Internet protocol (IP) addresses used for the attack on the JoongAng Ilbo, one of the country's major conservative media outlets, were either similar or identical to those used by the North in previous attacks.