Police have been granted a further 36 hours to detain and question the suspect.
Detectives are calling for witnesses following a series of hit-and-run incidents in Cardiff on Friday.
A 31-year-old man has been arrested on suspicion of murder.
As police continue to question a man on suspicion of murder after yesterdays hit and runs attacks the community has remained shocked today over the atrocity.
ITV News Correspondent Emily Morgan reports:
Rev Jan Gould is the vicar at the Church of the Resurrection in Ely said that the Church had been open for locals to help deal with emotions after the hit and run attacks across Cardiff:
Tomorrow, a special service will be held at the church at 5pm, to provide "an opportunity for the whole community to come together, share their grief and find support".
Reverend Jan Gould, who will lead a service tomorrow for the victims and families of the town's fatal hit-and-run collisions in Ely's Church of the Resurrection, said the feeling in the town was "like a state of carnage".
Labour MP Kevin Brennan has led the tributes to Karina Menzies, the 32-year-old mother-of-three killed in yesterday's hit-and-run collisions in Ely, Cardiff. He said the incident was "beyond senseless" and had "rocked the whole community".
"It's absolutely shocking what has happened and the fact that someone has appeared to use a vehicle as a weapon," Mr Brennan said. "Karina was a well-liked mother who had three children. One of her children is disabled and is currently on a dream holiday in Florida."
Social networking sites were flooded with tributes to the victim. Facebook user Katy Johanna Benson wrote: "Rest in piece Karina Menzies. Sleep tight beautiful angel and may the scum responsible for this senseless, evil murder be brought to justice. Cant imagine what her family are feeling."
Marine Thomas wrote: "r.i.p karina i didnt know u personally but from what ive heard u were a fab mum and will be missed very much :( this is a cruel world we live in and its always the good ones that go first. sleep tight angel."
The suspect in the Cardiff hit-and-run collisions used a crook lock - a heavy-duty metal car lock - to assault witnesses, it is believed.
Officers are also investigating whether the attacker was involved in a domestic incident before the fatal incident yesterday, according to unconfirmed reports.
Establishing who owns the white panelled van is said to be central to the inquiry.
Detective Superintendent Paul Hurley of South Wales Police gave this statement regarding the spate of hit-and-run incidents on Cardiff last night:
Witnesses or anyone with information is asked to call 101 or Crimestoppers anonymously on 0800 555 111.
The community of Ely, Cardiff, paid tribute to the 32-year-old mother-of-three who died after being hit outside the town's Fire Station by a driver who embarked on a series of apparently deliberate collisions with pedestrians on Friday.
A 31-year-old man was arrested on suspicion of murder after 14 victims were hit by a vehicle in five separate areas of the town.
This is the full list of victims in the Cardiff hit-and-runs including the locations where they were injured or killed and the nature of their injuries.