At least two people have been killed in a shooting in the eastern German city of Halle, police say.
The police said one person had now been arrested but other perpetrators may still be in a vehicle on the run.
The shootings took place in the Paulus area. Witnesses had reported one gunman wearing military camouflage and carrying several weapons.
The Bild newspaper said the attack took place near a synagogue but this has not been officially confirmed.
One witness said one attacker had thrown a petrol bomb or grenade over a cemetery wall.
After the attack in Paulus, police then warned residents of Landsberg, 8km (5 miles) north-east of the city, to stay alert.
It was not clear where the arrest took place. Police are still warning residents to remain in their homes.
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