Lauchringen (dpa / lsw) - With his courageous intervention, a gas station employee in Lauchringen (Waldshut district) prevented a robbery. According to the police on Friday, a masked 20-year-old had threatened the staff with a dummy gun and demanded money the day before. The employee knocked the gun out of the man's hand and put the robber to flight. Two employees at the gas station followed and caught the 20-year-old. They held him until the police came. The man was arrested. An arrest warrant was issued against him.