Gardaí in Dublin are investigating a serious assault in Ballymun early this morning.

A man in his 20s was assaulted at 3.45am at the Plaza apartment complex on Coultry Road.

He is believed to have suffered a number of stab wounds.

The man was taken to the Mater Hospital, where his condition is described as critical but stable.

No arrests have been made but gardaí are following a definite line of inquiry.

The scene has been preserved for forensic and technical examination.

Anyone with information is asked to contact Ballymun Garda Station on 6664400.