Two people were killed and several injured in a shooting in eastern Germany, police told Euronews.
It happened in the city of Halle and one or more suspects are on the run after fleeing in a car.
A spokeswoman for the Federal Attorney General said there was sufficient evidence for a possible right-wing extremist background to the crime.
Shortly after the incident, police said one person had been arrested, confirming the person arrested was a shooter.
“Our forces have detained one person,” the Halle police wrote in a tweet. “We remain alert, however. We have deployed forces in and around Halle and are trying to stabilise the situation until we have all the relevant information.”
The railway station in Halle, a city of 240,000, was closed down as a precaution amid the police operation.
Mass-selling daily Bild said on its website the shooting took place in front of a synagogue.
But a police spokesman could not confirm this to Euronews, saying it happened on a street containing both a church and a synagogue, not necessarily outside the Jewish place of worship.
On the same street is a Jewish cemetery.
The Federal Prosecutor’s Office is also investigating, suggesting the incident is a murder of special significance.
Whether it is an anti-Semitic act is still unclear, a spokesperson said on Wednesday.
A police spokeswoman told Euronews that there are at least two crime scenes.
Broadcasters in Germany aired images showing an alleged perpetrator dressed in combat clothes, including a helmet.
The Associated Press reports a person interviewed on n-tv television said he had been in a kebab shop when he saw a man with a helmet and a military jacket who he said fired shots into the shop, in the incident in Halle.
Police said they were also investigating reports of shots fired in Landsberg, 15 kilometres (about 10 miles) from Halle, although they could not immediately confirm any details.
“This is terrible news from Halle and I hope very much that the police catch the perpetrator, or perpetrators, as quickly as possible,” government spokesman Steffen Seibert said, interrupting a regular government news conference.