The victim sustained lacerations to the nose in the incident.
A man has been arrested in connection with what's described as a hikacking in Newbridge.
Gardai say a man was accosted by two men while driving in Morristown Biller.
They attacked him with a knife, and he sustained a laceration to the nose.
The suspected fled the scene.
Gardai at Kevin's Street, Dublin, detained a man in connection with the inquiry yesterday.
The vehicle was recovered.
The man, who is in his late twenties and from the wider Naas area, was detained an interviewed.
A file is being prepared for the Director of Public Prosections.