Russia conducted a strike against a Soviet-era satellite in space on Monday, creating more than 1,500 pieces of debris that U.S. officials said posed a reckless risk and showed Moscow’s insincerity when it says it doesn’t want to weaponize space.

The test marked the first time that Russia has demonstrated an ability to strike a satellite using a missile launched from Earth.

During a briefing, State Department spokesman Ned Price said the anti-satellite test had created more than 1,500 pieces of sizable debris that could damage other satellites or affect astronauts at the International Space Station.