North Korea launched “several” short-range ballistic missiles toward waters off the country’s east coast on Tuesday morning, according to South Korea’s Joint Chiefs of Staff (JCS).

The launch reportedly took place at around 9:30 a.m. KST from Kanggye, Jagang Province, a city known for hosting multiple important weapons factories. One is the Kanggye Tractor Factory, which makes the 600mm multiple-launch rocket system (MLRS) that North Korea claims is nuclear-capable.

The missiles flew “around 155 miles (250 km)” before landing in the East Sea (Sea of Japan), JCS said in a later update, without specifying how many were fired. It added