Ulm (dpa / lsw) – After the knife attack on a man in Ulm, an arrest warrant was issued on Saturday for attempted manslaughter against a 37-year-old work colleague of the victim. After the incident on Friday, the man turned himself in at a police station in Ulm and is now in a prison, the police said. He is said to have seriously injured his 33-year-old colleague, after which he was taken to a clinic. According to the police, the investigation into the course of the crime and the background is still ongoing.