Detectives investigating a hit-and-run rampage in which a mother of a disabled child was killed are appealing for information about a mystery car seen driving on the wrong side of the road shortly before the crashes.
Karina Menzies, 32, was killed and 14 people were injured when a driver brought terror to roads in Cardiff.
As it emerged that Ms Menzies' child is on a "dream holiday" in Florida and does not know of the tragedy, police revealed new details of the investigation.
Police are continuing to question a 31-year-old man on suspicion of her murder as well as investigating reports that he deliberately knocked people down in the Welsh capital with a white Iveco van.
Detective Superintendent Paul Hurley confirmed reports that the suspect left his vehicle and physically assaulted people between the crashes and also carried a weapon.
The officer said: "We are aware the suspect assaulted people outside his vehicle," and he added police were "looking to identify and recover" the weapon.
He said no firearm was involved and there was no suggestion anyone had been stabbed.
Mr Hurley urged witnesses to get in touch and asked for information about a black Renault Clio seen driving on the wrong side of the road of Western Avenue, not far from Cowbridge Road West, where one crash happened.
The horrific events began when police received calls about an incident in Crossways Road in Ely at 3.30pm.
This was soon followed by other reports of hit-and-run collisions in several locations in the west of the city, including Grand Avenue, Cowbridge Road West and the Leckwith Retail Park.