Three men, armed with knives and wearing balaclavas, broke into house near Norwich and demanded drugs - while a children's birthday party was taking place.
At about 6:50pm on Friday 11th January, three men forced their way into the property on Hunter Road and demanded drugs, before stealing a mobile phone and leaving the scene.
Four young children were having a party at the time. No one was injured during the incident.
All three men are described as black, two were around 6ft tall with one slightly shorter and all were wearing dark clothes and balaclavas.
Anyone who witnessed the incident or has information concerning it should contact Norfolk Police on 101 or alternatively call Crimestoppers anonymously on 0800 555 111.