One man has been arrested and three people injured, following a stabbing in Dublin city centre overnight.

At around 1am, a 31 year old man was found with stab wounds on Grafton Street. He was taken to St. James Hospital with serious injuries.

Gardai were then called to the scene of a second incident on Chatham Row, where a 35 year old man was found with stab wounds and a 22 year old woman had been assaulted.

They were also taken to St. James's Hospital with serious injuries.

In a follow up search of the area, a 25 year old man was arrested. He's being detained at Pearse Street Garda Station.

A number of scenes in the city centre have been preserved this morning.