Police have released four people from custody after a Dean Taxi driver was robbed with a hammer.
The "frightening" incident occurred in the early hours of Tuesday in Bensham.
The driver, who was uninjured, had a "large amount" of cash stolen on Eastbourne Avenue.
Four people were arrested after police - including a dog section - quickly swooped on the scene. Locals l ater praised their quick action.
Now a Northumbria Police spokesperson has confirmed that all four suspects have been released under investigation as the probe continues.
The two men, aged 46 and 37, were arrested on suspicion of robbery.
Another two, a 38-year-old man and a 34-year-old woman, were also arrested.
Chief Inspector Alan Pitchford. said: “This must have been a frightening incident for the driver of the taxi and I hope the four arrests give him some reassurance."
“It was an excellent response by officers in the area and that enabled them to quickly locate two men who matched the description of the thieves," he added.
“But the officers did not stop there and their searches of a nearby property has also enabled us to secure some evidence that could be vital to our investigation.
“A large amount of cash has also been recovered and we will continue to work hard to ensure anyone we believe to be responsible is charged to appear in court.
Any witnesses to the incident are encouraged to contact police.
Anyone with information they believe can assist the investigation is asked to report it online at the Northumbria Police website quoting log 70 12/05/20.
Dean Taxis has been approached for comment.
