Rapid City police are investigating a stabbing at Deadwood Ave and Interstate 90.
Spokesperson Tarah Heupel says it appears that two males, ages 32 and 33, and their dog wanted to sleep under the bridge at exit 55. A 58-year-old man was already sleeping there, and told them to leave.
The 58-year-old man stabbed the dog in the neck, and the younger men attacked him.
All three males were taken to the hospital with non-life threatening stab wounds.
The dog was picked up by animal control, also with non-life threatening injuries.