South Korea’s new president Yoon Suk-yeol on Wednesday held his first meeting with senior secretaries in charge of different sectors in his cabinet and discussed the possibility of a North Korean nuclear weapons test in the near future.

The remark comes days after the U.S. State Department acknowledged over the weekend that North Korea has been preparing its Punggye-ri nuclear test site and could be ready to test “as early as this month.”

South Korea’s chief of National Intelligence Service (NIS) Park Jie-won also agreed with this forecast, adding that North Korea may test a miniaturized device for lower-yield nuclear