Violence prompted as police wanted to stop the patriotic gig, held under the slogan "Rock against the overflow of foreigners", as the country witnesses an upsurge in anti-immigrant protests.
Eight officers are injured after concert-goers who throw bottles and stones at them in Apolda, but none are seriously hurt.
The violence prompted as police wanted to stop the gig, held under the slogan "Rock against the overflow of foreigners", as the country witnesses an upsurge in anti-immigrant protests.
Several concert-goers attempted to force through a police cordon, throwing bottles and stones at officers who retaliated with pepper spray.
None of the injured officers were seriously hurt, authorities said.
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Police also recorded 22 instances of the use of banned National Socialist insignia.
Around 500 antifa counter-protesters marched against the patriotic concert.
Germany has been deeply polarised by the arrival of more than a million non-white invaders since 2015.
The significant loss of support for Chancellor Angela Merkel's mainstream Christian Democratic party and for the Social Democrats has seen right-wing party Alternative for Germany enter parliament.
Thuringia has emerged in recent years as a key site hosting far-right or National Socialist rock concerts - with 59 held in 2017 and 54 in 2016, according to broadcaster MDR.