A suspect was arrested after a local council candidate for the far-right Alternative for Germany (AfD) was attacked with a knife, police and prosecutors said on Wednesday.
The attack on Tuesday was the latest in a series of incidents against politicians that have heightened concerns over rising political violence in Germany.
What we know about the incident
The candidate was attacked after confronting an individual who was trying to remove an election poster on Tuesday, officials said. The perpetrator injured the man with a carpet knife.
The politician was injured in the incident but did not suffer life-threatening injuries, a joint statement said.
The German DPA news agency reported that the incident happened at about 10:45 p.m. (2045 GMT/UTC).
Mannheim AfD councilor Jörg Finkler said his 62-year-old friend and colleague, who was taken to hospital, had suffered injuries to the ear and stomach.
Fears in Germany over rise in political violence
"We are shocked and dismayed," said AfD state chairman Markus Frohnmaier.
Police arrested a 25-year-old suspect who made a brief escape attempt and was said to have exhibited signs of mental illness as he was detained.
According to the AfD, the person attacked was Heinrich Koch, who is placed third on the party list for the Mannheim city council election on Sunday.
The alleged incident comes just days after another stabbing attack in the same city when a policeman was killed after sustaining injuries at a demonstration by the anti-Islamic group Pax Europa.
String of political attacks
Germany has been shocked by a series of attacks on politicians while they were working or on the campaign trail ahead of elections for the European Parliament.
A European Parliament lawmaker for Scholz's center-left Social Democrats, Matthias Ecke, was attacked by a group of youths last month while putting up election posters in the eastern city of Dresden.
Only days later, the former Berlin mayor Franziska Giffey was hit on the head and neck with a bag containing hard objects as she visited a library in the capital.
rc/ab (AFP, dpa)