Pictures from the scene showed a body lying in the street behind a police cordon.
German police say two people were killed on Wednesday in a shooting in the eastern German city of Halle.
"We have a deployment in Halle", the local police said on Twitter.
He added that several people had been injured, in addition to the two killed.
Other witnesses told Mitteldeutsche Zeitung that the attack unfolded right outside a kebab shop and that some shots were fired from inside a auto.
"There were several shots.The alleged perpetrators have fled with a vehicle".
The Bild and Mitteldeutsche Zeitung newspapers reported the shooting took place near a synagogue. It was unclear if the shooting was a deliberate attack on Yom Kippur, one of the holiest days of the year in Judaism.
Halle police wrote in a tweet:"Our forces have detained one person. We have deployed forces in and around Halle and are trying to stabilise the situation until we have all the relevant information".
According to MZ information, police units are all now being moved to Halle, as this is a "special situation".
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