Every few months, North Korea tests short-range rockets, hurling them into the sea with hardly a glance from the rest of the world. The frequency of those launches, however, has increased dramatically in the past month. On Saturday alone, Kim Jong Un’s military fired off 30, as if they were bottle rockets.

And today, the garrison kingdom raised the throttle significantly, shooting off what South Korea believes were two medium-range Rodong ballistic missiles. If true, the launch would violate United Nations resolutions. The pair of rockets flew off the east coast toward Japan, landing in the ocean, Seoul said.

Pyongyang hasn’t tested the Rodong since 2009, when the UN condemned its second nuclear test.