Police said on Twitter earlier they were looking for at least one suspect.
Several shots were fired and the suspects then fled in a vehicle, police said in a tweet. They gave no information on that person.
The Bild and Middeldeutsche Zeitung newspapers reported that there was a shooting. Multiple people, according to the police department, were killed in the shooting. "We remain alert, however".
One person is believed to have been arrested. "Please stay at home or look for another secure place".
Jews around the world were marking Yom Kippur on Wednesday, the day of atonement, and the holiest day on the Jewish calendar.
European Union brands Brexit deal 'essentially impossible'
The EU, however, has committed to Ireland that they will protect the GFA and the open border on the island. Mr Johnson's official spokesman also declined to say anything about the substance of the call.
Arsene Wenger Turned Down England Offers Due To Arsenal Allegiance
So once again, I loved the competition against you, we had some great times and it's wonderful you are getting this award tonight. Ozil and Emery have endured a hard relationship since the Spaniard replaced Arsene Wenger in the dug-out in the summer of 2018.
Swiss scientists win Nobel Prize in Physics
The Nobel Prize, first awarded in 1901, is widely considered the highest honor in science , economics, and literature. Swedish TV4 asked, "It's been 14 billion years since our Universe was created".
Other witnesses told Mitteldeutsche Zeitung that the attack unfolded right outside a kebab shop and that some shots were fired from inside a auto.
"Our forces have detained one person", a tweet from the police said.
Police said that shots were also fired in Landsberg, about 15 miles (just under 10 miles) from Halle. "We have deployed forces in and around Halle and are trying to stabilise the situation until we have all the relevant information".
National rail operator Deutsche Bahn said the main trainstation in Halle had been closed.