Russia’s space agency says an investigation has found that a rocket carrying a crew to the International Space Station failed recently because of a technical malfunction of a sensor.

The Soyuz-FG rocket carrying a NASA astronaut and a Roscosmos cosmonaut failed two minutes into the October 11 flight, sending their emergency capsule into a sharp fall back to Earth. They landed safely on Kazakhstan’s steppe, but the aborted mission dealt another blow to the troubled Russian space program that serves as the only way to deliver astronauts to the orbiting outpost.

Roscosmos’ executive director Sergei Krikalyov said Wednesday the probe found that a malfunction of a sensor which signals the jettisoning one of the rocket’s four side boosters caused the booster to collide with the second stage of the rocket.
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