Dublin attack was 'not terror-related'

Garashi Khanna reports on a serious assault in Dublin's Parnell Square E, involving multiple casualties, including children. The investigation is ongoing, with a person of interest identified. The community and schools are responding to the incident, and the Garda appeals for information and footage from the public.

What is known about the male in his 50s who is a person of interest in the investigation?

What information is the investigating officer seeking from the public regarding the attack?