The South Korean and Japanese militaries said on Tuesday that North Korea launched a ballistic missile into the sea in a continuation of its recent streak of weapons tests, hours after the US reaffirmed its offer to resume diplomacy on the North’s nuclear weapons program.

The South’s Joint Chiefs of Staff on Tuesday didn’t instantly say what kind of ballistic missile it was or how far it flew. Japan’s coast guard issued a maritime safety advisory to ships but didn’t immediately know where the weapon landed.

South Korea’s presidential office was aiming to hold a national security council meeting later in the day to discuss the launch.

Ending a months-long lull in September, North Korea has been ramping up its weapons tests while making conditional peace offers to Seoul, reviving a pattern of pressuring South Korea to try to get what it wants from the US.

Within days, President Joe Biden’s special envoy for North Korea, Sung Kim, is schedule to negotiate with US allies in Seoul over the prospects of reviving talks with North Korea.

Nuclear negotiations between Washington and Pyongyang have been delayed for more than two years over disagreements in exchanging the release of crippling US-led sanctions against North Korea and the North’s denuclearization steps.

His government has so far denied the Biden administration’s offers to restart dialogue without preconditions, saying that Washington must first abandon its “hostile policy,” a term the North mainly uses to refer to sanctions and US-South Korea military exercises.

But while North Korea is apparently trying to use South Korea’s desire for inter-Korean engagement to extract concessions from Washington, analysts say Seoul has little wiggle room as the Biden administration is intent on keeping sanctions in place until the North makes concrete steps toward denuclearization.

Last week, Kim Jong Un reviewed powerful missiles designed to launch nuclear strikes on the US mainland during a military exhibition and vowed to build an “invincible” military to cope with what he called persistent US hostility. Earlier, Kim dismissed US offers for resuming talks without preconditions as a “cunning” attempt to conceal its hostile policy on the North.

The country has tested various weapons over the past month, including a new cruise missile that could potentially carry nuclear warheads, a rail-launched ballistic system, a developmental hypersonic missile and a new anti-aircraft missile.

But the North in recent weeks have also restored communication lines with the South and said it could take further steps to improve bilateral relations if Seoul abandons its “double-dealing attitude” and “hostile viewpoint.”