According to South Korean military and intelligence, in the North Korean nuclear polygon, Punher is underway to restore one of the four tunnels, which indicates preparation for the test nuclear explosion, Yonhap agency reported.
As noted, work is underway on the creation of a side entrance to the third tunnel. According to the estimates of one of the sources of the agency, the object can be restored for the month.
yonhap binds increased concerns about the possible nuclear test in the DPRK with the launch of the intercontinental ballistic missile at this week, which was led by the North Korean leader Kim Chen Yun.
Experts believe that North Korea may experience a small tactical nuclear device that can be installed on the warheads of ballistic missiles.