Jang Song Thaek, uncle of North Korean leader KimJong Un, has been executed, Yonhap news service reported Friday, quoting the state news agency of North Korea. The announcement was made on Friday by North Korea. The execution took place Thursday after a special military trial, according to Pyongyang's official news agency, the Korean Central News Agency(KCNA). Jang was vice chairman of the powerful National Defence Commission and widely seen as the second most-influential figure in the nation, dpa said.