Thames Valley Police is appealing for information about an aggravated burglary in a village near Milton Keynes on Saturday (5/2).
At around 10.20pm, three masked men wielding knives burst into a property on Bedford Road, Cold Brayfield, via the rear door.
One offender punched a teenage boy in the face before demanding drugs and money.
One offender also threatened a man in his fifties before all of the offenders left the property and drove off – nothing was stolen.
A fourth offender is believed to have been in a vehicle waiting on Bedford Road.
The first offender was described as mixed ethnicity, around 6ft tall, of muscular build, spoke with a local accent and was wearing all dark clothing and a balaclava
The second offender was described as white, around 5ft 9ins tall, of slim build, spoke with a local accent and was wearing all dark clothing.
The third offender was described white, around 5ft 7ins tall, of slim build and wearing all black clothing and black trainers.
Detective Constable Matthew Hodgetts-Tate, of the Priority Crime Team based at Milton Keynes police station, said: “This was a very distressing incident for the victims and witnesses involved so I appealing for anyone with information to please get in touch.
“You can do so by calling us on 101 or by making a report on our website, quoting reference number 43220098963.
“Alternatively, you can provide information completely anonymously through the independent charity, Crimestoppers, by calling 0800 555 111 or by visiting its website.”