North Korea successfully tested a new short-range ballistic missile (SRBM) variant with improved warhead capacity on Monday at the long and short ends of its range, according to state media, with one possibly striking an inland target.

The Korean Central News Agency (KCNA) reported Tuesday that the Missile Administration carried out tests of the “Hwasong-11C-4.5” SRBM, stating it can carry a 4.5-ton warhead.

Two missiles were “tipped with a simulated heavy warhead to verify flight stability and hit accuracy at the maximum range of 500 km (310 miles) and the minimum range of 90 km (56 miles),” KCNA reported,