The Sauber driver brought the gravel underneath his car on the way back to the track, and the session was stopped with a red flag as there were too many gravels on track.
According to the statement, Sebastian Vettel did not slow down at that time and was under investigation.
This year, similar investigations were always given a grid penalty. The stewards reviewed the video records, listening to Sebastian Vettel and the team.
In the end, they announced that they gave a three-place grid penalty.
According to the statement, Vettel, under the red flag did not slow down enough. He was also given two penalty points.