GARDAÍ have interviewed more than 20 people in connection with the brutal killing of a 51-year-old grand-father which was sparked by a feud between rival families.

Gardaí fear there will be retaliation attacks and that a family feud will intensify after the death of a man following a fight outside a Cork city bar, according to the Evening Echo newspaper.

A TEAM of up to 60 gardaí are involved in the investigation into the brutal killing of a 51-year-old man who died after violence flared between feuding families in Cork city.