U.S. President Donald Trump’s announcement earlier in the week that he would suspend joint ROK-U.S. military drills came a “surprise” to Seoul, a South Korean presidential special advisor said on Friday.

Speaking at a news conference at the Seoul Foreign Correspondents Club (SFCC), Moon Chung-in said he would “not rule out” the possibility that Trump would not give additional concessions to North Korea in the future.

Following a historic DPRK-U.S. summit in Singapore on Tuesday, Trump said he would put an end to joint U.S.-ROK military drills while Pyongyang and Washington continued diplomacy.

“We could consider the issue of reducing the size of the