A mother and daughter were attacked with a metal stick and forced to sit on a kitchen floor as food, milk and water was poured on them during a burglary, police have said.
Officers were called to Vellus Court in Sutton-in-Ashfield, Nottinghamshire, at about 19:00 GMT on Monday.
The victims told police five men knocked on the door and hit them with the weapon before forcing their way in.
Nottinghamshire Police said high-value Asian jewellery was stolen.
The force added the victims were treated at the scene for superficial injuries.
Det Sgt Mark Shaw said: "This must have been a very frightening experience for those involved.
"Officers will be providing ongoing support for the family as a team of detectives work tirelessly to trace those responsible.
"Burglary is an extremely invasive crime and has huge impacts for those involved."