A man in his 20s has been arrested in connection to the crash in Bundoran, Co Donegal, in which a nine-year-old boy died.
The incident happened shortly after 9.20pm on Saturday night on Atlantic Way.
Ronan Wilson, from Kildress in Co Tyrone, was pronounced dead at the scene a short time later.
Traffic diversions were in place and the scene was preserved for a technical examination.
Gardaí said that the State Pathologist was notified and a post-mortem examination will be carried out at Sligo University Hospital.
Gardaí said the man was arrested yesterday afternoon in relation to the crash and is being questioned at a garda station in Donegal.
Gardaí also said a vehicle was seized in connection with the investigation which will undergo a technical examination.
Ronan was from the Kildress area outside Cookstown in Tyrone and played underage with Wolfe Tones GAA Club.
His brother and sister also play for the club. A number of fixtures were postponed yesterday as a mark of respect.
Club chairman Dominic McGurk said: "People are just numb and are in complete shock at the news.
"We are a tight-knit community here ... and we will come together and we will support the family.
"He had a lot of friends through school and through the club here and we just have to rally around them and give them as much support as we can."
Sinn Féin councillor Micheal McMahon, who lives in Bundoran, offered his deepest condolences to Ronan's family.
"Bundoran is filled with doom and gloom today. The wee boy came with his family from Tyrone. This seaside town is so popular with visitors from Tyrone.
"It's unthinkable that a place people come to relax and enjoy themselves ends in a tragedy like this. Gardaí and emergency services have worked tirelessly doing everything they can."
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SDLP MLA Patsy McGlone said the community of Kildress in Co Tyrone is broken-hearted.
"The whole community in Kildress and across Tyrone is broken-hearted today. The Wilsons are a well-known local family and this tragedy has shocked us all," said Mr McGlone.
Local woman Marie Downey said the town was devastated following the news.
"I'm here today with my son Rian, who is close in age to that poor wee boy. I can't begin to imagine what the family are going through. It’s heartbreaking," she said.
"My other son is 16 and he was in the area last night where the accident happened.
"He phoned me in a terrible state and we’re all just deeply shocked and numb at this tragedy."
Gardaí are appealing for the driver of the vehicle to come forward and have asked anyone who may have witnessed the incident to contact them.
They are also asking that anyone who has video footage, including dash cam, from Atlantic Way and Sea Road at the time of the crash to make it available to them.
Anyone with information is asked to contact Ballyshannon Garda Station on 074-9858530 or the Garda Confidential Line on 1800 666 111.