Kerry meets with South Korean counterpart on North Korea

U.S. Secretary of State John Kerry met with South Korean National Security Director Kim Jang-soo on Friday to discuss bilateral and regional issues on Thursday, according to the U.S. State Department.

Jen Psaki, the spokesperson for the State Department, made the remarks on Friday during her daily press briefing. Psaki said Kerry and State Department Under Secretary for Political Affairs Wendy Sherman had a productive exchange with Kim, during which both sides reaffirmed an intent to closely coordinate with respect to North Korea.

When asked if the two sides discussed North Korean nuclear issues and the Six-Party Talks, Psaki reiterated that the U.S. and South Korea discussed an agreement to coordinate and cooperate.

"Our position hasn't changed, that the ball is in North Korea's court," Psaki said. "So nothing has changed on that front as of this morning."

When asked about the recent surprise release of six prisoners by North Korea, Psaki said the U.S. supports improved relations between North Korea and South Korea.

"We of course support, as you know, inter-Korean - an improvement - an improved inter-Korean (relationship)," Psaki said.

Psaki said she could not speak to a recent think tank report talking about the expansion of tunnel work in North Korea at its nuclear testing site. She said the U.S. position has not changed in terms of the steps North Korea must take going forward.