An investigation is under way after criminal damage was caused to the grave of former president and taoiseach Eamon de Valera. 

A man in his 50s was arrested at around 3.30pm and taken to Mountjoy Garda Station for questioning. 

He is due to appear in court tomorrow morning.

It is understood damage was caused to the headstone and the gravestone was also vandalised. 

De Valera is buried in Glasnevin Cemetery.