What police have described as a 'large fight' in Maughold on Friday left a man needing hospital treatment.
Police say the scuffle broke out at a house party at the lighthouse in the village.
Ramsey police are calling for people who were at the party - which carried on into the early hours of Saturday morning - to come forward.
Call them on 812234, or police headquarters on 631212.
Ben-my-Chree sailing cancelled due to 'technical issues'
All Manannan journeys are going ahead as planned
81 'unsafe squishy toys' seized
Parents urged to check for unsafe items
Manx Utilities open 'prior information notice' for Garff Sewage Treatment works
It says it's not a 'competitive tender process' at this stage
Island takes centre stage as TT film crew to return
Filming of 'Isle of Man' to continue next month