Seoul (AFP) - North Korea on Saturday blasted US President Barack Obama as a "monkey" inciting cinemas to screen a comedy featuring a fictional plot to kill its leader, and threatened "inescapable deadly blows" over the movie.The isolated dictatorship's powerful National Defence Commission (NDC) also accused the US of "disturbing the Internet operation" of North Korean media outlets.The country suffered Internet blackouts this week, triggering speculation that US authorities may have launched a cyber-attack in retaliation for the hacking of Sony Pictures -- the studio behind madcap North Korea comedy "The Interview" -- which Washington says was carried out by Pyongyang.The NDC accused Obama of taking the lead in encouraging theatres to screen "The Interview" on Christmas Day.