United States 'very actively' asking North Korea to return to talks - South Korea

Bystanders holding North Korea and U.S. flags wait for the motorcade of U.S. President Donald Trump in Hanoi, Vietnam, February 27, 2019. REUTERS/Ann Wang/Files

SEOUL (Reuters) - The United States is "very actively" trying to persuade North Korea to come back to negotiations, South Korea's national security adviser said on Sunday, as a year-end North Korean deadline for U.S. flexibility approaches.

South Korea was taking North Korea's deadline "very seriously", the adviser, Chung Eui-yong, told reporters, at a time when efforts to improve inter-Korean relations have stalled.