A man has been charged in relation to the murder of Detective Garda Colm Horkan.
The man, aged in his 40s, is due to appear before a special court sitting in Co Roscommon tonight.
Mr Horkan was shot dead in Castlerea on Wednesday night.
It comes as hundreds of people gathered in Mayo and Roscommon to pay their respects to Mr Horkan.
There were emotional scenes in Ballaghaderreen as the hearse carrying the remains of Mr Horkan made its way through the town towards his home in Charlestown on Friday.
The cortege was flanked by gardai on motorcycles, while people lined the streets where Mr Horkan had worked for several years.
Floral tributes were left outside Ballaghaderreen garda station. In Castlerea, where the garda was shot dead, many people queued to sign a book of condolence.
Mr Horkan’s funeral will take place at St James’s Church in Charlestown on Sunday.
I have opened online Book of Condolence to allow Dubliners to express their sympathies to family & colleagues of Detective Garda Colm Horkan who was killed while on duty serving and protecting the people of Ireland. It can be signed at https://t.co/W1upVqEoi5 until Tues 23 June pic.twitter.com/t49fiiG7ud— Lord Mayor of Dublin (@LordMayorDublin) June 18, 2020
Mr Horkan was shot dead while on duty on Wednesday night.
The man was arrested shortly after the murder and was questioned by gardai for almost two days.
Gardai believe Detective Horkan’s gun was taken from him after he became involved an altercation while he was on patrol in the town.
Signing the book of condolence for the late Detective Garda Colm Horkan in Wexford Garda Station. Ar dheis DÃ© go raibh a anam. pic.twitter.com/xF47C8VqRC— BrendanHowlin (@BrendanHowlin) June 19, 2020
Garda Commissioner Drew Harris has described the killing as a “random act”.
Hundreds of local people gathered in Castlerea on Thursday evening for a vigil paying tribute to Detective Garda Horkan.
Gardai are examining how a State funeral will be held for Detective Horkan given the Covid-19 restrictions as members of the public will also want to pay their respects.
Books of condolence have opened at garda stations around the country.
Dublin City Council has opened an online book of condolence, with all messages to be presented to Detective Horkan’s family.
Meanwhile, Bishop of Elphin Kevin Doran said the death of Detective Garda Horkan has caused outrage in the area and appealed for calm.
Bishop Doran said the community in Co Roscommon is still trying to come to terms with Detective Horkan’s death.
“There is an actual feeling of revulsion in people about what happened… it is important we don’t allow what has happened to bring our society down to that level. What has happened and the cruel way in which it happened, does not and cannot define the kind of society that we are,” he told Shannonside FM.
Politicians were among those signing books of condolence.
Sinn Fein leader Mary Lou McDonald and Labour TD Brendan Howlin were among those to pay their respects.