Three masked men broke into a home in Poole and threatened the occupants, including young children. They then stole high value Asian jewellery and cash.
Detectives say the incident happened at approximately 9.15pm on Friday 13 January 2017 in Ashley Road.
All three offenders are described as white, in their early twenties and speaking with a local accent.
One was about five feet four inches tall, of medium build, with pale skin and blue eyes. He was wearing a grey hooded top, dark trousers, gloves and work boots.
The second man was also five feet four inches tall but of slim build. He was wearing a black jacket with red stripes on the sleeves with the hood up. He has a goatee-type beard.
The third offender was also of medium build.
Detective Sergeant Andy Haworth, of Bournemouth CID, said: “This was a very frightening ordeal for the occupants but fortunately nobody was harmed during the incident.
“I am appealing for anyone with information about those responsible to contact us as soon as possible.
"Also, if anyone is offered Asian jewellery in unusual circumstances, they should report this to police.”