A barrage of ballistic missiles that North Korea test-fired over the weekend may have included a new type of a Scud with an extended range and improved accuracy that poses a threat to Japan, a South Korean newspaper reported today.

Pyongyang launched seven missiles into waters off its east coast Saturday in a show of force that defied U.N. resolutions and drew international condemnation.

Today, South Korea’s mass-circulation Chosun Ilbo newspaper reported the launches were believed to have included three Scud-ER missiles with a range of up to 620 miles.

The paper said the Scud-ER has a longer range and better accuracy compared with previous Scud series, so is “particularly a threat to Japan.”