A Russian satellite has broken up into more than 100 pieces of debris in orbit, forcing astronauts on the International Space Station to take shelter, U.S. space agencies said. There were no immediate details on what caused the breakup on June 26 of the RESURS-P1 Russian Earth observation satellite, which was decommissioned in 2022. U.S. Space Command said on June 27 that there was no immediate threat as it tracked the debris swarm. It occurred in an orbit near the space station, prompting U.S. astronauts on board to shelter in their spacecraft for roughly an hour, NASA's Space Station office said.