Residents in the Dungannon area have been left shaken after forceful sale calls.
Reports say the people were trying to sell occupants pillows and duvets.
The white transit van they were travelling in was last seen in the co. Tyrone area.
Local people in the area have taken to social media to warn others about the vehicle.
One resident said "Those lads where in Fivemiletown on Wednesday, came to my door like twice-morning and noon, one in his thirties wearing blueish winter coat other around 17, curly hair would beg you to buy pillows. Annoyed that i wouldn't."
Police have asked anyone who sees the van to contact them on the non emergency number 101.
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