The 33-year-old man and 22-year-old woman had originally not been considered suspects in the attempted murder of police chief Alois Mannichl last weekend.
However, late Wednesday night a court ordered the two be arrested and held for helping the man who stabbed Mannichl as he opened his front door on Saturday.
Police also released a new description of the suspect, whom they believe to be part of Bavaria neo-Nazi scene. The man is thought to be between 25 and 35 years old, approximately 1.90 metres tall, and he speaks with a Bavarian accent that could possibly have an Austrian lilt.
Mannichl reportedly answered his front door on Saturday to a tall skinhead at around 5:30 pm. The man said something along the lines of “Greetings from the national resistance,” and said, "You leftist pig cop, you won't trample on the graves of our comrades any more," before stabbing Mannichl in the stomach with a 12-centimetre knife.
He then threw the knife away in the garden and ran to a waiting car in a nearby street and was driven away.
The 52-year-old police chief was seriously wounded, but is now recovering from the attack.