South Korean President Moon Jae-in declined to answer a question from The Associated Press on Saturday on what would have to happen before he took up leader Kim Jong-un on his invitation to visit the North.

Moon earlier said “let’s not get too far ahead” on a summit, according to his office.

Otherwise, Moon reportedly voiced his hopes that his efforts to engage rival North Korea at the Olympics would also lead to improved ties between Pyongyang and Washington, in addition to helping to set up talks on eliminating North Korea’s nuclear weapons.

Moon is yet to accept the offer to visit North Korea, which was delivered on February 10 by Kim’s younger sister, Kim Yo-jong. All he has said so far is that the two Koreas should “create an environment” for talks.

Many analysts say Moon’s hesitation is the result of pushback from Washington, which is leery of engaging in talks with Pyongyang without some reciprocal moves or concessions by the North.