The United States has accused Russia of conducting the test of an anti-satellite weapon in space that Washington fears could be used to threaten critical U.S. and allied satellites, RFE/RL report.

The Russian Defense Ministry said that a small space vehicle on July 15 inspected one of its satellites up close “using special equipment.” However, the United States said on July 23 that the craft actually had a different mission.

Space Command said that on July 15 a Russian satellite, designated Cosmos 2543, “operated in abnormally close proximity to a U.S. government satellite” before moving on to another Russian satellite, where it released an object at high speed.

“The Russian satellite system used to conduct this on-orbit weapons test is the same satellite system that we raised concerns about earlier this year, when Russia maneuvered near a U.S. government satellite,” said General John W. Raymond, commander of Space Command and the head of the U.S. Space Force.