An arrest warrant is out for a man and woman in their 20's from Sarnia after a fight involving two sisters escalated.
Police say they were called to the fight on Tuesday night and then returned to the same location on Kathleen Avenue a short while later.
Investigators say another fight broke out when the boyfriend of one of the sisters showed up with two other women.
Police say this time a knife was shown.
The suspects left the scene before police arrived and are now charged with a variety of offences including assault with a weapon and assault causing bodily harm.