Gardaí are investigating the sudden death of a man in his 50s near Dublin's Grafton Street.

He was found unconscious on the footpath of Suffolk Street at around 4.00am this morning.

It's understood he had been sleeping rough.

The man was taken to St James's Hospital where he was pronounced dead.

The coroner has been notified but gardaí at Pearse Street say they don't suspect foul play.