A number of youths were involved.
Three teenagers have been hospitalised following an assault in Co. Kildare last night, while one teenager has been arrested.
The incident happened in Naas at around 10.45pm in the Harbour View and Basin Street area.
Three teenage boys were taken to Naas General Hospital with non life threatening injuries, while Gardaí arrested one teen today, and he's being questioned at a Garda Station in Kildare where he can be held for up to 24 hours.
Gardaí are appealing to anyone who was near the harbour in Naas last night between 10-11pm to contact them.

Kfm Recruiting for Advertising Sales Dept.
Further Increase Expected In Number Of Landlords Leaving Property Market, As Price Of Three-Bed Semi Rises In Kildare
Over 1,700 Garda Checkpoints In Operation Over Christmas Period, With Naas RPU Detecting Multiple Speeding Motorists
€1.2m Approved For Zipline And High Ropes Adventure Centre At Donadea
Fury After Sallins Sunshine Club Misses Out On Funding As Other Counties Get Millions
Christmas Appeal To Adopt Dogs As Euthanasia Figures Rise
Speed Enforcement To Increase In Kildare With 21 New Camera Zones To Be Rolled Out In January
Over 400 Motorists Caught Speeding So Far Today, Including A Driver In Kilcock