Updated

The Latest on anti-migrant protests in Germany after the fatal stabbing of a German citizen (all times local):

6:25 p.m.

Thousands of far-right protesters have started marching through a city in eastern Germany where a German man was killed almost a week ago and two migrants face charges in the slaying.

Leaders of Germany's Alternative for Germany party and of populist group Patriotic Europeans Against the Islamization of the West wore dark suits and held white roses as they began what they called a "mourning march" Saturday night.

Several thousand people followed behind them in the city of Chemnitz. Many participants held German flags and posters of alleged victims of migrant violence.

Large numbers of police officers lined the streets while watching to keep the far-right crowd away an earlier protest against anti-foreigner sentiment that drew about 2,000 participants, according to the German news agency dpa.

The opposing camps confronted one another violently in Chemnitz on Monday, shocking people in others parts of Germany

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5:20 p.m.

Germany's interior minister says he understands why people "are upset about the brutal killing" of a German citizen for which two migrants face charge.

The Funke Media Group quoted Interior Minister Horst Seehofer as saying that despite the fear and anger, "there's no excuse for violence" in Chemnitz, the Saxony city where the slaying happened six days ago.

Seehofer's tough stance on migration has put him at odds with German Chancellor Angela Merkel. However, he stressed a message of unity as far-right groups prepared to hold more anti-migrant protests in Chemnitz.

He said: "We need a strong state and we have to do everything politically to overcome the polarization and division of our society."

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4:35 p.m.

Emboldened far-right activists in eastern Germany hope a protest joining establishing groups announces the arrival of a nationwide anti-migrant movement to challenge the political establishment.

Several groups scheduled rallies Saturday in the city of Chemnitz over the Aug. 26 killing of a German citizen, allegedly by migrants from Syria and Iraq. The two largest groups invited concerned citizens to join them later as they converge for the first time, hoping a broader far-right drive emerges from their display of unity.

Counter-protesters organized a rival rally that could test authorities' ability to keep the peace. The opposing camps confronted one another in Chemnitz on Monday, and scenes of vigilantes chasing foreigners in the city's streets have shocked people in others parts of Germany since then.

The increasingly open displays of anti-migrant sentiment and violence reflect Germany's ongoing effort to come to terms with an influx of more than 1 million refugees and migrants seeking jobs since 2015.

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2:15 p.m.

Germany's far right is trying to make protests this weekend a watershed moment in which different nationalist groups — from lawmakers in national parliament to Hitler-saluting skinheads — will come together in a national anti-migrant movement to challenge the political establishment.

Several rallies by different far-right groups will merge on Saturday night, and organizers have invited concerned citizens to join the marches protesting the killing of a German man last week, allegedly by migrants from Syria and Iraq. They are hoping that unity could signal the beginning of a broad far-right pact in eastern Germany.

A rival rally by their opponents will test authorities' ability to keep the peace after scenes of vigilantes chasing foreigners in the city streets shocked Germany this week.

The right blames Chancellor Angela Merkel's decision to allow in hundreds of thousands of asylum-seekers from war-torn countries like Syria, Iraq and Afghanistan for multiple problems. Some far-right supporters argue that migrants are responsible for an increase in serious crimes, especially attacks on women.

The anti-migrant sentiment has been particularly strong in Saxony, the state where Chemnitz is located and traditional strongholds of two groups that are seeking to launch a nationwide movement Saturday night.

The Patriotic Europeans Against the Islamization of the West, or PEGIDA, has held weekly rallies in Saxony's capital of Dresden for several years. The far-right Alternative for Germany party, or AfD, received almost a quarter of the Saxony vote in Germany's national election.

PEGIDA's strength had fizzled in recent years while groups like AfD successfully used anti-Muslim to propel themselves into federal and state parliaments across Germany. The stabbing death of the 35-year-old man in Chemnitz six days ago provides the provincial group an opportunity to reactivate its base.

The share of foreigners in Saxony remains below the national average, although concerns about foreigners committing crimes are particularly high in the eastern state.

Far-right sympathizers who mostly met cautiously in a shame-marked country where displays of Nazi symbols are illegal mobilized with exceptional speed on the night of the slaying and the days after.

The efficiency could indicate that support for an agenda rooted in anti-Muslim rhetoric could be rising among ordinary Germans holding concerns about their new neighbors.

Local police appeared to have been caught unprepared when the slaying triggered protests that attracted crowds openly engaging in Nazi veneration and which devolved into violence.

The protests were sparked by a fatal stabbing early Sunday morning of a 35-year-old German man, Daniel Hillig. Two asylum-seekers, a 22-year-old Iraqi and a 23-year-old Syrian, have been arrested on suspicion of manslaughter.

German Interior Minister Horst Seehofer, known for his anti-migrant stance, said Saturday that he understood why "the people in Chemnitz and elsewhere are upset about the brutal killing" but added "there's no excuse for violence," Funke Media Group reported.

"We need a strong state and we have to do everything politically to overcome the polarization and division of our society," Seehofer stressed.

AfD and PEGIDA announced their Saturday marches would merge at some point. The two nationalist groups, who have not officially worked together before, appear to be working to build a mass of citizens who are uncomfortable with the recent pace of immigration against the political establishment.

Protesters attending a rally organized by third group, Pro Chemnitz, said they would join the combined demonstration, German news agency dpa reported. Some 1,500 people marched over to the announced location of the night event while shouting "We are the people" and "Merkel needs to go," dpa said.

While anti-migrant protests took place in Germany before, especially during the early 1990s, a strong and vocal opposition usually was there to provide a counterforce. Artists organized concerts to raise awareness, and ordinary citizens lined up in miles-long human chains to protest violence against newcomers.

Chemnitz, however, has seen a comparatively weak counter-protest movement to challenge the renewed anti-migrant activity so far. The city is known for its hardened neo-Nazi scene.

"I've a lot of experience with far-right protests in Chemnitz," said Tim Detzner, a member of the Left Party in Chemnitz, adding that the street riots this week "were a new dimension."

"It reached a level of aggression, brutality and willingness to use violence that we haven't known before," Detzner said.

Several hundred people showed up for a "Heart not Hatred" rally Saturday afternoon that was held to oppose the latest hostility and aggression. Some 70 left-leaning and pro-migrant groups organized the demonstration.

"We want it to be clear that the majority here thinks differently, not far-right and not anti-foreigner," Lars Klingbeil, a leading member of Germany's national Social Democratic Party, said.

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Grieshaber reported from Berlin. Frank Jordans contributed from Berlin.