BERLIN, Germany (AP) -- A video showing a German army instructor telling one of his soldiers to envision African-Americans in the Bronx while firing his machine gun was broadcast Saturday on national television. The video, coming after scandals involving photos of German soldiers posing with skulls in Afghanistan and the abuse of recruits by instructors, seemed likely to raise more questions about training practices in Germany's conscript army. "We can no longer talk about an isolated case," said Lt. Juergen Rose of the Darmstaedter Signal, a group of current and former army officers and sergeants who independently review military procedures. "Things like this don't happen in the army on an everyday basis, but unfortunately in recent years there have been a number of comparable incidents." The Defense Ministry said the video was shot in July 2006 at barracks in the northern town of Rendsburg and that the army has been aware of it since January. "We are currently investigating the incident," said Florian Naggies, a spokesman for the army and Defense Ministry. He did not identify the instructor or the soldier, who are shown in camouflage uniforms in a forest. The instructor tells the soldier, "You are in the Bronx. A black van is stopping in front of you. Three African-Americans are getting out and they are insulting your mother in the worst ways ... Act." The soldier fires his machine gun several times and yells an obscenity several times in English. The instructor then tells the soldier to curse even louder. The existence of the video was first reported on the home page of the German news magazine Stern on Friday and excerpts of the video were aired on the news television channel n-tv on Saturday. According to Stern, the 90-second video had been posted on a Web site used by soldiers to exchange private videos. A soldier who used the site alerted his superiors, the magazine reported. The video is the latest embarrassment for the German army. Eighteen army instructors are currently on trial for allegedly abusing and humiliating 163 recruits in 2004. Last year, newspapers published photos of German soldiers in Afghanistan posing with a skulls -- including one who exposed himself while holding a skull. Copyright 2007 The Associated Press. All rights reserved.This material may not be published, broadcast, rewritten, or redistributed.