A man who was found seriously injured in an apartment complex in Dublin city centre this morning has died.

The man, who was believed to have been in his 50s, was found at Markievicz House at around 11am in the south inner city.

He was taken to St James's Hospital, but pronounced dead there this afternoon.

The scene has been preserved and the Garda Technical Bureau is conducting a forensic examination. 

A post-mortem examination is due to take place, but gardaí at Pearse Street Garda Station have begun a criminal investigation.

They have set up an incident room and are appealing for witnesses or anyone with information to come forward.