The United States opposes a plan by South and North Korea to set up a no-fly zone over their heavily fortified border, the latest sign of a rift between Seoul and its top ally, two sources familiar with the matter told Reuters.
Washington and Seoul both publicly insist they are on the same page about dealing with Pyongyang. But behind the scenes, there are growing signs of disagreement as South and North Korea forge ahead with plans to defuse military tensions and rebuild economic ties.
The military accord, sealed during last month’s summit in Pyongyang, is one of the most concrete agreements between the neighbors this year. But U.S. officials have raised concerns that it could undermine defense readiness and comes without substantial progress on denuclearization.
The pact includes a halt in “all hostile acts,” a no-fly zone around the border and a gradual removal of landmines and guard posts within the Demilitarized Zone.
U.S. Secretary of State Pompeo expressed “discontent” with the agreement during a phone call, South Korea’s Foreign Minister Kang Kyung-wha said last week in a rare disclosure of discord between the allies.
The United States was not likely to openly protest against an inter-Korean initiative, Seoul officials said, but its deep involvement in sanctions enforcement and military operations give it leverage to delay or change the policy.
The no-fly zone is a key sticking point for the U.S. because it would effectively prevent close air support drills, the sources said, adding that Pompeo raised the issue during the call with Kang. Both sources spoke on condition of anonymity because of the sensitivity of the matter.
The zone, effective Nov. 1, will extend 40 kilometers north and south from the Military Demarcation Line in the East and 20 kilometers in the West for fixed-wing aircraft.
The agreement also bars live-fire drills involving fixed-wing aircraft and air-to-ground guided weapons in the no-fly area. South Korea and the United States had held such drills regularly until halting joint exercises in June.
There are different restrictions on helicopters, drones and balloons, with exemptions for commercial and non-military operations such as medical, disaster and agricultural uses.
In close air support, airplanes provide firepower for troops who may be operating near enemy forces. Most fighter jets that U.S. forces operate in South Korea, such as the F-16, can play that role, one of the sources said.
An official at Seoul’s foreign ministry said Pompeo had not been “fully briefed” when he complained about the inter-Korean deal, and called back that day to wish Kang good luck with the summit.
The U.S. State Department declined to comment.
Pentagon spokesman Lieutenant Colonel Christopher Logan declined to comment on the agreement but said the Department of Defense backs efforts to reduce military tensions.
The department “remains in full support of our diplomats as they work to achieve the verified denuclearization of the DPRK as agreed to by Chairman Kim (Jong Un),” Logan said, referring to North Korea by its official name, the Democratic People’s Republic of Korea.
A spokesman at South Korea’s defense ministry said Seoul cooperates closely with Washington and the U.S.-led United Nations Command (UNC).