Two men had to be taken to hospital after a disturbance outside of a hotel in Argyll and Bute.
The incident took place on Saturday, at around 10pm, outside the Rosslea Hotel in Rhu.
Police say that a 27-year-old man was seriously assaulted and was taken to the Queen Elizabeth University Hospital.
A 42-year-old man was also assaulted and was taken to the Royal Alexandria Hospital.
Their injuries are not believed to be life threatening at this time.
Detective Inspector Fiona Macarthur, of Dumbarton CID, said: “We know the hotel area would have been relatively busy at the time and the consequences of this incident could have been far worse.
“We’re appealing to people who witnessed the incident or has any relevant information to contact us.”
Anyone with information is asked to contact Police Scotland on 101 quoting incident number 4135 of October 23.
Alternatively, they can contact Crimestoppers anonymously on 0800 555 111.