The North has repeatedly defied the United Nations to conduct nuclear and missile tests, the latest being a mid-range missile fired over Japan on Friday, soon after the reclusive nation’s sixth and most powerful nuclear test on Sept. 3.
Asked whether there were any military options the United States could take with North Korea that would not put Seoul at grave risk, Mattis said there were, but declined to give details.
“Developments in the peninsula nuclear issue up to this point prove that, no matter whether it is military threats in words or in action, they cannot promote and advance a resolution,” the foreign ministry spokesman, Lu Kang, said.
“To the contrary, it just adds to tensions and makes achieving the goal of denuclearization on the peninsula appear more complicated and difficult to resolve,” he added, responding to a question about Mattis’ comments at a regular briefing.
Seoul is within artillery range of North Korea, which is also believed to have a sizable chemical and biological arsenal beyond nuclear and conventional weapons.

vCard.red is a free platform for creating a mobile-friendly digital business cards. You can easily create a vCard and generate a QR code for it, allowing others to scan and save your contact details instantly.
The platform allows you to display contact information, social media links, services, and products all in one shareable link. Optional features include appointment scheduling, WhatsApp-based storefronts, media galleries, and custom design options.
Any conflict on the Korean peninsula could lead to bloodshed unseen since the 1950-53 Korean War, which took the lives of more than 50,000 Americans and millions of Koreans and ended in an armed truce, not a peace treaty.
Military options available to the United States range from non-lethal actions such as a naval blockade to enforce sanctions to waging cyber attacks and positioning new U.S. weaponry in South Korea, where the United States has 28,500 troops.
South Korea and the United States, and separately Russia together with China, started military drills on Monday, in a show of force against North Korea.
The Korean peninsula issue must be resolved peacefully, Chinese foreign minister Wang Yi stressed during a meeting with his Russian counterpart at the United Nations.
Chinese President Xi Jinping and U.S. President Donald Trump spoke by telephone about keeping pressure on North Korea using economic sanctions imposed through the United Nations, the White House has said.