A neo-Nazi who took part in an anti-Jewish protest outside NSW Parliament has been taken into immigration detention ahead of his looming deportation back to his native South Africa.

At the same time, Australia Post says it is investigating whether one of its employees – a regional delivery manager – was among the 60-odd members of the National Socialist Network involved in the rally.

Matthew Gruter (third from left) with other members of the NSN outside NSW Parliament on November 8.

Matthew Gruter, a civil engineer and senior member of the National Socialist Network, had his visa cancelled by the Home Affairs Minister Tony Burke on Monday after the Herald revealed the South African native was among the black-clad neo-Nazis who shouted antisemitic slogans at the rally on Saturday,

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