The Garda Síochána Ombudsman Commission has appealed for witnesses as part of its investigation into the death of a 40-year-old man in Co Westmeath on Saturday 23 March.

Father-of-three Danny McCormack was arrested by gardaí who were called to the Midland Regional Hospital, Mullingar on Saturday evening.

He died later after collapsing at his home following his release from garda custody.

A GSOC investigation into his death was announced on Monday.

It will interview members of his family, staff at the hospital and members of An Garda Síochána to ascertain the full details of Mr McCormack's death.

GSOC has appealed for people who were in the emergency department of the hospital, or outside the hospital, between 7.40pm and 8.20pm on Saturday and who saw Mr McCormack to contact them.

Mr McCormack lived with his family at Raheen in Mullingar. They have expressed concern about the circumstances leading up to his death.

They say he went to the emergency department on Saturday afternoon, complaining of chest pains.

He was involved in an incident there and security staff and gardaí were called to remove him from the building.

Some time later, he returned to his home in Raheen, where his family say he was bleeding and distressed.

He collapsed and later died in hospital.