Berlin: A gunman injured several people in the college hall in southwest German City Heidelberg on Monday, police said.
The police said in a brief statement that the perpetrators were dead, but did not provide details about how it happened.
They previously asked people on Twitter to avoid the Neuenheimer Feld area in Heidelberg, where the City University campus was located.
The police did not determine how many people were injured, or how serious.
The University press office refused to provide details about the shooting and referred to all questions to the police.
The German news agency DPA quoted an unknown security source said that the Gunman committed suicide.
It also reported, without quoting sources, that gunmen were believed to be students themselves, and that security officials said the initial indication was that he did not have a political or religious motive.
The police said the weapon used in the shooting was a long-barreled firearm.
Heidelberg is located in the south of Frankfurt and has around 160,000 residents.
His university is one of the most famous Germany.