The North Korean military may have test fired a new type of artillery rocket on its east coast recently, one with a long range that could be a substantial threat to South Korean.

The Korean People’s Army (KPA) fired a total of eight rounds from a new 300mm multiple rocket launcher (MRL) artillery system near Wonsan on February 21 and March 4, YTN and Yonhap reported, citing Blue House spokesman Min Kyung-wook and Ministry of National Defense spokesman Kim Min-seok. North Korea test fired four rockets of about a 300mm caliber into the sea on each day along with 240mm rockets and SCUD missiles. The rockets reportedly reached a range of around 155km to the northeast of Wonsan, but the MND estimates the weapon’s maximum range as 180-200km. The test firing took place at the Galma Peninsula near Wonsan on the country’s southeastern coastline, a site which the KPA has used in the past for artillery firing drills.