GARDAI investigating the murder of a young criminal who was shot dead at his brother's wedding have made another arrest.
Robert Sheehan (21) was shot dead in Bunratty, Co Clare on September 2 last.
Investigating gardai are today questioning a man whom they arrested in Limerick city.
The 59-year-old from Limerick is being questioned at Shannon garda station and can be held for a maximum of seven days.
Investigating detectives believe he conspired to murder Sheehan, but is not one of the chief suspects.
He was arrested yesterday.
On September 2 last, Sheehan from Moyross, Limerick, was shot five times in the head while he smoked a cigarette outside the Bunratty Castle hotel while attending the wedding celebrations of his brother, Andy.
Gardai believe that Sheehan was targeted after he stabbed a well known criminal in Moyross last July.
The pair fought openly in broad daylight in the Delmege Park estate - just weeks after Sheehan had trashed the man's apartment.
The dispute originated after the rival criminal began a relationship with a former girlfriend of Sheehan's.
Officers are satisfied that there was only one gunman involved in the shooting - a hired hitman.
The suspected gunman and the Limerick based criminal, who officers think ordered the attack, fled to the UK and are believed to be still hiding out in England.
The man behind the attack is a well known figure on Limerick's criminal scene and has links to the McCarthy-Dundon gang.
He previously served a five-year-prison term for his role in a shooting incident when members of the opposing Keane-Collopy gang were targeted.
A fortnight ago, gardai arrested another three men in connection with the murder.
Investigations are continuing.