A man posing as an Amazon delivery driver was one of three men who burst into a couple's home and demanded cash.
Police were called to the home in Southampton and were told a man holding an Amazon package rang the doorbell at around 8pm on Saturday.
The occupant answered the door, believing she was accepting a delivery, before the man pushed his way in and two other men followed.
The woman was knocked to the floor as the men demanded money.
Her partner, who was also present, tried to defend her against the three men and was attacked with a hammer and a knife before they trio left the property, in Blackthorn Road.
They are believed to have then driven off in a silver car at around 7.10pm.
The victims both sustained minor injuries.
Nothing was taken.
Officers say the fake delivery driver was aged between 18 and 25, about 6ft 3ins, white and of medium build.
He was holding a knife and an Amazon branded delivery box, while also wearing a face mask, a hat or hood, a dark blue puffer jacket and gloves.
The other men were described as being white, aged between 18 to 25 years old, with one looking slightly older than the other.
One was possibly wearing a balaclava and holding a hammer
Detective Inspector Howard Broadribb said: “This was a serious incident which has understandably shaken the occupants and their family.
“Did you see anyone matching these descriptions in the area at the time?
“We would also like to speak to you if you have CCTV, ring doorbell or dash cam footage of the incident, or the moments before or after.
“I appreciate this incident may cause concern in the local community, so we are increasing patrols in the area and we are engaging with the community for any information that will help us identify those responsible.
"I want to reassure the public that incidents on random addresses such as this are extremely rare.
"I believe someone will know who has done this and that’s why I am turning to the public to help bring these offenders to justice to protect any further harm being caused. Attacks such as this will not be tolerated.
"I would like to take this opportunity to remind anyone not expecting a delivery from a courier or company to take the usual precautions, such as seeking ID before opening the door; using intercoms/ ring doorbell systems to establish who is at the door and using door chains or other security devices to confirm ID before opening the door fully.
"If you’re unsure, then don’t answer the door.
"I would ask anyone who can help me find those responsible to please contact Hampshire Constabulary on 101."
