Pete Taylor was training fighters at Bray Boxing Club in Bray, County Wicklow, near Dublin, just before 7am this morning when a shooter opened fire.
The shooting has left a 30 year-old man dead.
Taylor is the father of professional boxer and Olympic gold medallist Katie Taylor.
Pete Taylor, 57, and an unidentified 35-year-old man were taken to an area hospital for treatment, according to various media outlets in the United Kingdom.
Gardaí are looking for a Volkswagon van with a Northern Ireland registration plate as part of their investigation into the incident.
A forensic examination of the scene is being carried out by Gardaí (Irish police).
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Father-of-three Mr Messett died at the scene, where around 20 people had gathered for an early-morning gym session.
"Dear Club Members and Friends of Bray Wheelers", they posted on Facebook. It was set up by Pete Taylor in 1996.
The man's body was removed from the club at around 2pm in a blacked out vehicle.
There was a heavy gardai presence at the scene on Tuesday as officers investigated the shooting.
The club is located at the harbour in Bray town.
Bray Municipal Council chair Chris Fox said: "Bobby would be very well-known in sporting circles in Bray, very much into soccer and keeping fit and used to go to the club before his day's work. I have no doubt that the Gardai are doing all they can to apprehend those responsible".