UPDATE: A neighbour has told of chilling screams from inside a Toowoomba home where a woman was being threatened by her partner.
On hearing the screams, Craig Pinkney raced across the street to help the young pregnant woman.
"I could hear the woman scream and getting bashed," he said.
"So I pounded on the door and said open up the door, you mongrel.
"He opened up the door and saw he had a knife in his hand.
"I thought, right, I'm calling the cops."
Multiple police units arrived within minutes, but not before Mr Pinkney had gotten further inside the residence and saw the woman on the floor behind the man.
Mr Pinkney and another man, an off-duty firefighter, stayed inside the residents while the man, still holding the knife by his side, calmed down.
He said police had been called to the address three times in the past week.
The man and the woman had moved into the normally quiet street only a week ago.
"You can't let somebody smash the crap out of them like that," Mr Pinkney said when asked why he helped the woman.
Today is White Ribbon day, the day set aside to turn the focus onto domestic violence in the home and a unified date when people take a stance against violence in the home.
EARLIER: A man has been arrested after he allegedly held his pregnant partner captive with a knife to her throat in a unit in Mt Lofty, Toowoomba.
The incident was reported to emergency services about 11.05am.
The man reportedly forced his way into the unit by kicking in the front door before arming himself with the knife.
Neighbours called police before taking matters into their own hands, forcing their way into the unit and saving the woman.
Police have arrested the man.
The pregnant woman is being treated by paramedics but is not thought to be seriously hurt.