Trump Calls South Korea's President, Promises to Maintain Alliance and Restrain North Korea

The president-elect promises the U.S. will work with the nation 'to protect against the instability in North Korea.'

South Korean President Park Geun-hye speaks during a meeting with Kazakh President Nursultan Nazarbayev at the presidential house in Seoul, South Korea, Thursday, Nov. 10, 2016. REUTERS/Ahn Young-joon/Pool

South Korea says President-elect Donald Trump has promised to maintain the countries' strong alliance to guard against what he describes as "the instability in North Korea."

President Park Geun-hye's office says Trump made the comments while saying he believes North Korea is very unstable during a 10-minute telephone conversation with Park on Thursday.

Park's office quotes Trump as saying the United States "will be steadfast and strong with respect to working with [South Korea] to protect against the instability in North Korea."

A statement from Park's office says Trump told Park "we are going to be with you 100 percent" when Park proposed strengthening the alliance to make the North Korean leadership change its way of thinking.

There have been worries in South Korea that a Trump presidency could bring a major shift in U.S. economic and diplomatic ties with Seoul. Trump has questioned the value of the U.S.-South Korea security alliance.