North Korea on Monday shot off at least three unidentified projectiles, causing tension in the Asia-Pacific region. This was the second time that Kim Jong Un's regime shot off projectiles in the past two weeks.

The projectiles were launched 31 miles into the sky, covering a distance of 125 miles, South Korea’s military said. Seoul has expressed “deep regret” about the launches, claiming that North Korea’s actions are counterproductive to achieving peace on the Korean peninsula.

Japan also expressed alarm towards the launches.

“North Korea’s latest action, on top of its repeated firings of ballistic missiles, is a serious threat to the peace and safety of Japan and ... a grave problem for the entire international society,” Japan’s Chief Cabinet Secretary Yoshihide Suga said.

North Korea previously launched two short-range projectiles on March 2. Pyongyang is growing increasingly frustrated with the sanctions placed on its economy and the lack of progress of nuclear negotiations with the United States.

The U.S. and North Korea have been involved in diplomatic talks for the last two years, with Washington wanting Pyongyang to pursue a path of denuclearization in exchange for reduced sanctions on the isolated Asian nation. The two nations last held talks in October, but negotiations fell through on the first day of meetings.

President Trump and Kim have had an improved personal relationship, but this hasn’t resulted in a nuclear agreement. The two leaders held diplomatic summits in June 2018 and February 2019 but failed to reach a deal.

Democratic presidential candidates have criticized Trump’s meetings with Kim, while former National Security Adviser John Bolton claiming that North Korea will never give up its nuclear arsenal.