Pyongyang said it was frustrated with South Korean comments focusing exclusively on North Korean nuclear aggression. The North Korean government said U.S. military drills in the region were inhibiting peace efforts.
The South Korean Yonhap News Agency quoted North Korea's ruling Workers' Party of Korea as saying it was losing patience because "signals are being sent (to Pyongyang) and that it is [the North Korean government] that is not responding" to diplomatic outreach.
North Korea said this week it was interested in pursuing a bilateral engagement with the United States to review nuclear security councils. Previous sentiments expressed by North Korea were brushed off as insincere.
U.S. State Department spokeswoman Jen Psaki said during her regular press meeting Tuesday the U.S. policy on dialogue with North Korea has not changed.
"We are committed to authentic and credible talks on denuclearization with our partners," she said.
Multilateral talks with North Korea were suspended in 2009. North Korea has since conducted three nuclear tests.