A freelance journalist was reportedly stabbed in an attack by three teenagers in Naumburg in the northeastern German state of Saxony-Anhalt, local media reported.

Klaus-Peter Krümmling was leaving a Rewe supermarket just before 8 p.m. on Friday when he was confronted by the three youths as he tried to get into his car, reported the Naumburger Tageblatt, one of the papers Krümmling writes for.

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One teenager allegedly spat in the direction of his car and gave the middle finger. Krümmling then confronted the three about their behavior near the pedestrian crossing in Weissenfelser Strasse, which led to one teenager allegedly stabbing the 59-year-old reporter in the stomach, Naumburger Tageblatt reported.

During the attack, one of the perpetrators showed the Hitler salute, the Leipziger Volkszeitung reported police as saying.

"Only later in the car did I see that my stomach was wet and everything was red. Once I was home, I alerted the police," Krümmling told Naumburger Tageblatt.

The stabbing left a six-centimeter-deep wound but did not damage any organs, the paper reported Monday, adding that Krümmling was receiving treatment in hospital.

A police spokesperson said there is so far no indication that the attack was made in connection to Krümmling's journalistic work.

Police investigations are still ongoing, with none of the perpetrators yet identified.