The German national was fatally stabbed in the city of Kothen, located in the Saxony-Anhalt state. The German Bild newspaper reported, citing local police and prosecutors, that two suspects, both Afghan citizens, had been detained.
"The madness goes on! The Germans are slaughtered everywhere like cattle, we can't let this happen! Everybody come to the Karl Marx monument [in Chemnitz] on Friday," Pro Chemnitz posted on Facebook.
According to Bild, the suspects engaged in a row with another Afghan citizen and a German woman at a playground. When two other German nationals approached them, a fight erupted, which resulted in heavy injuries for the 22-year-old who later died in hospital. The victim's brother has reportedly been tried over his right-wing stances.
The protests have reportedly left 18 people injured, while hundreds have been detained.
On Monday, German Chancellor Angela Merkel condemned the rallies as promoting violence, while her spokesman Steffen Seibert voiced his support to Merkel's stance, slamming the protest actions as an attempt to divide the country.