Summerside police are investigating the incident, which occurred around 11 p.m.
Police say that a 19-year-old Charlottetown man and 17-year-old Prince County woman attended a St. Stephen Street residence and forced their way inside.
Once inside, the 17-year-old was demanding property for one of the residents.
A friend of the tenant of the residence was allegedly sprayed with a chemical irritant and the suspects made off with a cellular phone and a small amount of cash.
The incident was not reported to police until the following morning.
As a result, both parties were arrested and taken before a justice of the peace.
The 19-year-old man faces charges of robbery and wearing a disguise while committing an offence, while the woman is facing charges of robbery and assault with a weapon.
Both have been released on strict conditions and will appear in court at a later date.
The victims were not injured and did not seek medical attention.
Police say that the matter remains under investigation.
