According to the agency, it can carry an ultra-large warhead weighing up to 4.5 tons.
During yesterday’s tests, two missiles were launched with a maximum range of 500 kilometers and a minimum range of 90 kilometers.
“This was done to confirm flight stability and impact accuracy,” the post said.
At the same time, the DPRK’s General Directorate of Rocket Science has vowed to continue launches this month.
The South Korean military said the DPRK fired an unidentified ballistic missile in an easterly direction the day before. It gave no details and said it was analyzing the situation.