Police say at around 3:06 a.m., officers responded to a report of a domestic assault at a home on Laurel Lane when they found two victims with knife wounds.
Both victims were conscious and taken to St. Francis Hospital, where they are reported to be in stable condition.
According to police, Christopher Rich, the son of the two victims, was arrested and charged with assault and attempted murder. He is being held on a $500,000 bond.
Police say that there are no other suspects being sought and that there is no danger to the public.
The State Police Central District Major Crime Squad is assisting Granby Police with the investigation.