Heidenau, a town of around 16,000 inhabitants near Dresden yesterday, has become the focus of Germany's struggle to absorb a vast wave of asylum seekers that is expected to reach a record 800,000 this year.
"Saxony sought the help of federal police and this support will be provided," interior ministry spokesman Johannes Dimroth said, without saying how many officers would be deployed.
Last weekend, police and far right demonstrators clashed outside a refugee centre in Heidenau. On a visit to the town this week Chancellor Angela Merkel was booed by protesters.
An administrative court in Dresden on Friday declared the ban "clearly illegal", saying police forces from around the country could be sent as backup.
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"In addition, the police have the resources, including water cannon, to prevent any disproportionate damage," the court said.
But a few hours later Saxony's administrative court of appeal reinstated the prohibition, banning all gatherings over the weekend, including those in support of refugees.
Chancellor Angela Merkel herself pledged to do "everything possible to provide support to the Saxony police" at a news conference with Danish Prime Minister Lars Rasmussen.
But as she arrived at the centre, some 200 people jeered and booed her, shouting far-right slogans, including "Traitor, traitor!" and "We are the mob".