A taxi driver has been arrested on suspicion of attempted murder after a cab collided with eight railway workers.
The incident was believed to have followed a furious street row between a cab driver and the workers yesterday evening.
It finished with the cab colliding with the men, who were all wearing high visibility clothing, injuring eight people.
The incident happened in Wood Street, Cardiff, south Wales, at around 7pm yesterday, close to the city's railway station.
All eight were taken to hospital in Cardiff suffering a series of injuries, including spinal, but none life-threatening.
A witness last night spoke of his shock at the chaos he encountered when he arrived on the scene.
"I turned up to see all of these people in their work clothes sprawled out on the floor I had no idea what happened," he told the Daily Mail online.
"It looked like a couple of them might be dead. They weren't moving and it was really worrying.
"But loads of ambulances and police cars turned up really quickly and people that were passing by rushed to help."
The road, which incorporates a bridge, was closed to traffic last night while investigations were under way. It has since reopened.
Police today appealed for any witnesses to come forward.
"Eight male pedestrians, all from Cardiff, were taken to hospital following an incident involving a taxi on Wood Street bridge," a spokesman said.
"One of the men - aged 35 from Grangetown - remains in hospital having suffered burns.
"A 28-year-old man was arrested at the scene on suspicion of attempted murder and is currently in police custody.
"Detectives are checking CCTV in the area and are asking any businesses or residents to review their CCTV for any footage which may assist.
"They are also appealing for anyone who may have witnessed this incident or events leading up to the collision to contact them."
Anyone with information is asked to contact Cardiff CID on 02920 527 420 or Crimestoppers on 0800 555 111.