The International Space Station is stable and astronauts on board are safe after a new Russian module began firing its engines without prompting, causing the station to shift in space said NASA officials.

The space station flies at a certain altitude for several reasons, including communications with satellites in order to talk to the crew and to direct sunlight to the solar arrays that power the space station.

Roscosmos, the Russian space agency, will lead the investigation into the random engine firing and NASA will review the ISS structure to determine if there is any damage. Montalbano estimated the initial “quick look” at the incident could be done by Friday evening.