Updated: 16.30

Mountjoy Prison in Dublin went into lockdown earlier after a prisoner gained access to the roof.

Prison service negotiators managed to convince him to come down.

At around 3.00pm on Friday afternoon, a prisoner gained access to the roof of Mounjoy causing the prison to go into lockdown.

The incident meant only staff were permitted to enter the prison grounds.

A prison service spokesman says negotiators worked with the prisoner to talk him down safely.