North Korea fires 2 ballistic missiles into Sea of Japan, Tokyo says

North Korea on Tuesday fired off a couple of ballistic missiles into the Sea of Japan in its latest act of aggression in the region and just hours after the U.S. reaffirmed its offer to resume diplomacy on its weapons program.

At least one missile was fired from near its Sinpo Naval Shipyard, where Pyongyang holds its submarines and equipment that can fire these submarine-launched ballistic missiles, Reuters reported, citing South Korea’s Joint Chiefs of Staff.

The officials said in a statement they detected the North firing one short-range missile it believed was a submarine-launched ballistic missile from waters near the eastern port of Sinpo, and that the South Korean and U.S. militaries were closely analyzing the launch. The South Korean military said the launch was made at sea, but it didn’t elaborate whether it was fired from a vessel submerged underwater or another launch platform above the sea’s surface.

The launch comes as South Korean, Japanese and American intelligence officials are holding meetings in Seoul to discuss a way forward on the peninsula.

Last week, North Korean leader Kim Jong Un reviewed powerful missiles developed to launch nuclear strikes on the U.S. mainland, as he vowed to build an “invincible” military to cope with what he called persistent U.S. hostility.