A German politician has been arrested for allegedly displaying Nazi symbols, after “Sieg Heil” was regularly heard coming from the headquarters of a fraternity to which he belongs.

Daniel Halemba, 22, of the Alternative for Germany (AfD), was elected to the Bavarian parliament earlier this month.

Police raided the premises of “Tuetonia Prag” student fraternity and found a number of Nazi symbols.

Mr Halemba was arrested hours before he was due to gain immunity as an MP.

He is one of 32 AfD members elected in the far-right party’s best-ever election result in Bavaria, where it is now the largest opposition party in the state.

Police in Würzburg last month raided the premises of Mr Halemba’s fraternity after neighbours complained of hearing shouts of “Seig Heil” from inside.

Officers said they had confiscated banned material and that the raid “confirmed the allegations [made by neighbours]”.

The phrase was a key Nazi slogan and is banned in Germany.

Police issued an arrest warrant on Friday and Mr Halemba was tracked down near Stuttgart, in the state of Baden-Württemberg, on Monday morning.

He is under investigation on suspicion of sedition and possessing banned symbols. In Germany, Nazi iconography is outlawed.

“They want to arrest me … using a totally lawless arrest warrant,” Mr Halemba said in a video posted to social media before his arrest.

His lawyer, Dubravko Mandic, said the allegations against his client had “no truth”.

Katrin Ebner-Steiner, the leader of the AfD in the Bavarian parliament, denounced what she termed a “politically motivated” prosecution.

The AfD has enjoyed record election results in recent months.

The anti-immigration party came third in this month’s Bavarian election and second in the eastern state of Hesse.

The party now regularly polls second nationwide. Germany’s next federal election is due in 2025.