TOKYO (AP) — North Korea's state media released photos Wednesday that appear to show the designs of one or possibly two new missiles.

Concept diagrams of the missiles were seen hanging on a wall behind leader Kim Jong Un while he visited a plant that makes solid-fuel engines for the country's ballistic-missile program.

One of the photos clearly showed a diagram for a missile called "Pukguksong-3," which appears to be the latest in its Pukguksong, or Polaris, series. The other was harder to discern, though it carried a "Hwasong," or Mars, designation name.

The photos were carried in the morning...