In recent months, North Korea has been demonstrating progress with its nuclear program - bomb tests are getting stronger, stronger, and missiles go farther.
"Our weapons are meant for protecting our motherland from the permanent US nuclear threat", Choe Son Hui, the head of the North American section at her country's Foreign Ministry, said in an address at the Moscow Non-Proliferation Conference, according to Russia's state-run Tass news agency.
"The U.S.is running amok by introducing under our nose the targets we have set as primary ones", the state-controlled Korean Central News Agency warned, Newsweek reported.
"Our nuclear response will aim at the US, but not any other third country".
On Monday, the US and South Korean navies kicked off a five-day round of military drills, featuring the USS Stetham and the USS Mustin guided-missile destroyers, as well as the USS Reagan supercarrier.
The joint US-South Korea drills, dubbed the Maritime Counter Special Operations Forces Exercise (MCSOFEX), are said to "promote communications, interoperability, and partnership" between the militaries of the two countries.
Tensions have increased between Pyongyang and Washington since the regime began testing intercontinental ballistic missiles that could hit the U.S. mainland.
"Our leader Kim Jong Un has explained our stance: we will coerce the Americans to peace and respond to fire with fire".
The official says Uganda specifically demanded the exit of individuals representing the Korea Mining Development Trading Corporation.
Lee and Yun also discussed ways to handle the North Korea nuclear standoff through diplomacy including sanctions and pressure and to bring North Korea to "sincere" talks for denuclearization, it said.
"We will develop the concept of operations that suppresses North Korea's weapons of mass destruction in the early stages, while minimizing damage", Kim said Thursday.