The Health Minister says the public disorder on Dublin streets last night was "thuggish" and "completely unacceptable".
It follows another night where large crowds of young people gathered to socialise in the South William Street, Stephen's Green and Temple Bar areas.
14 people were arrested and one officer was hospitalised with a leg injury while a patrol car was also damaged.
Five teenagers were among 14 people arrested for public order offences in Dublin last night, after large crowds gathered in the city centre.
Glass bottles were among the missiles thrown at Gardaí.
Stephen Donnelly says the disorder that was seen should not have happened.