Four Traverse City West graduates were assault victims in Grand Rapids.
The incident happened sometime after 4:00 am Monday.
The victims told police that 4 or 5 suspects forced their way into their house, while they were sleeping.
The victims were struck by pistols and then forcibly bound.
Police say one of the victims, not from Traverse City, was sexually assaulted by the suspects.
The suspects fled after the assaults and stole personal property from the victims.
The suspects were described as black males, wearing dark clothing including black hooded sweatshirts. One of the suspects is 6 foot 2 inches, skinny build, wearing a white bandana and white shirt. An additional suspect had a shaved head and wore an orange bandana.
This incident is still under investigation. If you have any information about the incident call police at 616-456-3604 or call the silent observer.