An unmanned Russian spacecraft on a failed resupply run to the International Space Station is heading back toward Earth faster than original predictions, with a fiery demise in the atmosphere expected early on Friday, U.S. Air Force tracking data show.

The Russian Progress capsule, loaded with more than three tons of food, fuel and supplies, blasted off aboard a Soyuz rocket from the Baikonur Cosmodrome in Kazakhstan on April 28.

Flight controllers lost contact with the freighter shortly after it reached orbit, and tracking radars later showed the capsule was tumbling. The cause of the accident is under investigation.