The US has tested a medium-range cruise missile weeks after pulling out of a key treaty with Russia that banned such nuclear-capable weapons.
The Pentagon said it successfully launched the missile off the coast of California on Sunday.
Moscow accused the US of « escalating military tensions ».
The US withdrew from the Intermediate-Range Nuclear Forces (INF) Treaty on 2 August after accusing Russia of violating it – a claim Moscow denies. Analysts fear the collapse of the INF could spark a new arms race.
The Cold War-era treaty banned missiles with ranges of 500-5,500 km (310-3,400 miles). The Pentagon said the missile, launched from the US-Navy controlled San Nicolas Island off the coast of Los Angeles, was « conventionally configured », meaning not nuclear-equipped.
« The test missile exited its ground mobile launcher and accurately impacted its target after more than 500km (310 miles) of flight, » the US defence department said in a statement. « Data collected and lessons learned from this test will inform the Department of Defense’s development of future intermediate-range capabilities. »