Astronauts on board the International Space Station were instructed to shelter inside their respective spacecraft after reports indicated pieces of a broken-up satellite were headed their way.

Specifically, the remains of a derelict spacecraft called Resurs-P 1, a Russian commercial Earth observation satellite that launched in June 2013, were spotted by space junk monitor LeoLabs.

“Early indications are that a non-operational Russian spacecraft, Resurs P1 (SATNO 39186), released a number of fragments between 13:05 UTC 26 June and 00:51 UTC 27 June,” Leolabs tweeted late Wednesday evening.