BIELEFELD -- Young German males are showing an increasing readiness to turn violent in social situations, a study by youth researcher Christian Palentien has revealed in the northern German city of Bielefeld, DPA reported.

In an interview with Deutsche-Presse Agentur (DPA), he said: "A small section of German youth is feeling restless and is prepared to be violent on a regular basis."

He was speaking after a 17-year-old had taken pupils at his former school at Juechen in the state of North Rhine-Westphalia hostage for several hours and threatened them with a knife. No one was injured in the incident.

Speaking from experience with his patients, Palentien said between 10 to 12 per cent of the 13- to 17-year-olds had a tendency to become physically violent.

"Additionally, there is a large group of youths who become violent sporadically and in certain situations," he said.

Hangers-on can be found in such circles and stir up trouble only when the ringleaders attack first.

The scientist bases his case on regular studies carried out by Bielefeld University at schools in all German states.

Some causes of the increasing readiness to become violent may be problems at home and at school as well as disappointment about the lack of prospects.

Poor living conditions play an important role, says Palentien who urged parents and schools to stress the need to avoid violence: "What we need are clear rules and mechanisms for solving conflicts."