Gardai have raided the house of a man believed to be involved in the murder of father-of-three Stephen Lynch.
Around 20 heavily armed officers were involved in the operation. It targeted the home of a young man who is a suspect in the savage hit-and-run murder of Mr Lynch (32) in Tallaght last week.
Yesterday morning's raid was one of two carried out in South Dublin by gardai investigating the murder.
The development comes as Stephen's funeral is due to take place at 11am today, at St Aidan's Church in Brookfield, Tallaght.
The raid early yesterday began when members of the Garda Armed Support Unit used a battering ram to storm the home.
Around a dozen Regional Support Unit officers, some armed with machine guns, arrived in three Jeeps while around half a dozen detectives were also involved in the search, which lasted for more 90 minutes.
Gardai believe a violent former boxer was present with three other young men - including two brothers from Crumlin - when Stephen was deliberately run over by a car last Thursday evening.
Sources revealed the aim of yesterday's operation was to establish any "forensic links to the suspect and the car used in the murder".
Gardai left the property with a large number of evidence bags containing clothes and other items seized.
Senior officers decided that a heavily armed garda presence was required for the raid because of concerns that the suspects had firearms and, a risk assessment showed, could be "armed and dangerous".
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No arrests were made but the murder investigation was said to be progressing well.
The former boxer is involved in a bitter feud in Crumlin and is the chief suspect for two extremely serious assaults in that area. Earlier this month, gardai investigating the feud seized almost €15,000 in cash from the thug in a raid.
A large crowd is expected at Stephen's funeral today.
More than 500 people attended a candle-light vigil honouring him on Wednesday night.
His heartbroken mother Vera Donovan said earlier this week that she was "overwhelmed" by the support she had received from the people of Tallaght.
"I feel like everyone is behind me and holding me up because I am not able to carry myself," she said.
"If I didn't have this support, I would have gone to bed and never gotten up.
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"I really want to thank everybody for the sheer volume of texts, cards, floral tributes and teddies that have arrived in recent days.
"I knew Stephen was popular but not this popular and everybody has been really amazing and is carrying me and my family.
"Stephen was my son, my baby, and it doesn't matter what I say to the people who did this, he is never coming back."