North Korea may have fired short-range missiles Saturday morning local time after weeks of no activity, the South Korean Yonhap News Agency reported.
The country's Joint Chiefs of Staff confirmed that Pyongyang launched "unidentified projectiles" from the eastern province of Gangwon and they flew approximately 150 miles before landing in the East Sea.
Japanese news outlet Kyodo reported the tests may have been ballistic missiles.
A statement from the White House on Friday said President Trump has been briefed on the situation in North Korea and his team is monitoring the situation.
The launch comes after a quiet period from North Korea this month. After Trump threatened "fire and fury" if North Korea continued to test its missile program, the country's leader, Kim Jong Un, threatened to launch missiles near Guam, but later put those plans on hold.
Trump said Kim made the right decision when he scrapped a plan to fire missiles toward Guam, the U.S. island territory in the Pacific Ocean that is home to two major military bases.
"Kim Jong Un of North Korea made a very wise and well reasoned decision. The alternative would have been both catastrophic and unacceptable!" Trump tweeted last week.
Government officials in Pyongyang were dealt new sanctions by the U.N. Security Council's 15-member nations earlier this month in response to North Korean aggression.