Three men are being held in custody following a robbery on Sunday afternoon.
Det Insp Jim Griffiths said the incident occurred at Ashcroft Close, Batley, at 2.50pm.
He said a man had knocked at the door of the property and claimed there was a parcel for a named person at the address.
Mr Griffiths said the 18-year-old lad immediately thought something was wrong but had little time to react as the men rushed in and rounded everyone up.
They made a search of the property and left in a van.
Unfortunately for them the police were alerted and not long afterwards they were arrested.