The flight test of a “conventionally configured ground-launched cruise missile” was conducted on August 18 at a range on San Nicolas Island, California, the US Department of Defense said Monday. After a successful launch, the missile struck its target more than 500km (310 miles) away.

Weapons with a range of between 500km and 5,000km were banned under the Intermediate-Range Nuclear Forces treaty, a key arms control mechanism that helped de-escalate Cold War nuclear tensions when it was signed in 1987.

In February this year, the US announced it was quitting the treaty, accusing Russia of having a non-compliant missile system. Moscow denied the accusations and invited inspections of the system, but no one took it up on the offer. The treaty expired on August 1.

DETAILS TO FOLLOW