One teenager remains in garda custody in connection with a stabbing incident in Co Mayo on Saturday night.
A 17-year-old boy was stabbed a number of times in the Railway Walk area of Westport at around 11pm.
He was taken to hospital, where he is now said to be in a serious but stable condition.
Three men, aged in their late teens, were initially arrested.
Two have been released without charge while one other remains in garda custody in Westport this morning.