Former U.S. President Jimmy Carter is considering visiting Pyongyang at the invitation of the North Korean government, a U.S. source familiar with the matter said Monday.
Carter discussed the possible trip with Secretary of State John Kerry and National Security Adviser Susan Rice the same day, the source said.
If the trip goes ahead, Carter is likely to discuss with North Korean officials issues of human rights, humanitarian aid and Pyongyang's nuclear programs, the source said.
But details of the trip remain unclear, such as when Carter could go to Pyongyang and whether he could meet with North Korean leader Kim Jong Un.
The North Korean government invited Carter, having previously called on the U.S. government to hold a bilateral meeting on issues such as the nuclear issue.
North Korea is also inviting other former state leaders to Pyongyang including former Finnish President Martti Ahtisaari, a Nobel Peace Prize laureate, according to the source.
Carter, 88, became the first former U.S. president to visit North Korea in 1994 and met with then North Korean leader Kim Il Song after bilateral ties became tense due to Pyongyang's nuclear program.
Carter went to North Korea also in August 2010 and April 2011, and reportedly planned to do likewise this May.