North Korea fired several ballistic missiles over the country’s eastern coastline on Monday, according to South Korean and Japanese officials.

The missile launches were North Korea’s latest ballistic weapons test, while tensions continue to escalate in northeast Asia and the Korean peninsula. The South Korean Joint Chiefs of Staff spokesman Jang Do-young said the country’s northern neighbor launched different types of missiles from around Pyongyang, with one flying over 559 miles to land in the Sea of Japan, according to the Associated Press.