German police arrest an arrest warrant that led to the Chemnitz protest

In this Aug 27, 2018 file photo protesters light fireworks during a far-right demonstration in Chemnitz, Germany, after a man died.

Germany launched an investigation into the leak to right-wing groups of an arrest warrant for an Iraqi suspect in a stabbing case that sparked two days of violent anti-immigrant protests.

Interior Minister Horst Seehofer said judicial authorities should use all available means to respond to the leaking of the arrest warrant of the 22-year-old Iraqi suspect for the fatal stabbing of a 35-year-old German.

The death provoked violent protests against foreigners in the eastern city of Chemnitz.

The filtering of the order was a very unusual occurrence that generated harsh criticism throughout Germany, which has strict privacy guidelines for judicial proceedings, and raised concerns about possible links between the police and anti-immigrant parties.

Critics said the order, which contained details on the number of stab wounds, may have leaked to increase anger against migrants.

The stabbing and subsequent protests have exposed deep divisions in German society over the decision of Chancellor Angela Merkel of 2015 to open the door to more than one million immigrants, mostly Muslims fleeing Middle East conflicts .

The incident has also revealed the close links between a number of anti-immigrant groups, including football hooligans and the Alternative for Germany (AfD) party, and their ability to quickly mobilize thousands of protesters.

Prosecutors said Wednesday they had launched an investigation into the escape and that they had taken steps to protect two witnesses named in the document.

The deputy prime minister of the state, Martin Dulig, a social democrat, suggested in two interviews in the German media that the leak probably came from the police or judicial authorities. "We have a bigger problem to face there," he told the MDR television network.

A spokesman for the prosecutor's office in Dresden, which is handling the investigation, said the circle of those who had access to the document was not small.