SALEM, Ore. -- A Salem man was arrested and charged with assault after he attacked his friend with a bong causing him to require medical treatment, police said.

Police said Vincent Gallagher was tripping on psychedelic mushrooms early Tuesday morning and became convinced that his friend was a narcotics officer.

Gallagher then began beating his friend with the glass smoking device, breaking it in the process and continuing slashing his friend with the jagged edges, police said.

Gallagher now faces drug and assault charges.

Police also arrested the woman who lives at the home, Amanda Sayers, on suspicion of drug possession.

The victim is expected to be OK.