The 29-year-old woman was hit by a lorry as she used a pedestrian crossing in south London while the traffic lights were green, then is believed to have been hit by another lorry and two cars.
None of the drivers stopped at the scene, police say.
Two of the drivers have since come forward to police but officers have now released CCTV images as they work to find the other two drivers.
The CCTV footage shows a white lorry – thought to be the second vehicle involved in the collision – and a black car that is believed to be the third.
The 49-year-old man who was driving the first lorry to hit the victim in Tulse Hill on Monday morning has since been traced and interviewed under caution, the Met Police said.
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The 52-year-old driver of the second car has been released under investigation following his arrest on Tuesday evening on suspicion of causing death by careless driving.
The woman, who was staying with family in Wandsworth but was originally from Poland, died from multiple injuries, a post mortem examination revealed. She was due to be formally identified on Friday.
Acting Detective Sergeant Alastair Middleton said: “We are grateful for all those witnesses who have come forward, but we continue to appeal for anyone who was passing and witnessed the collision and the moments afterwards to contact us immediately.
“Inquiries are continuing to trace the two outstanding vehicles involved. A number of actions, including the recovery of local CCTV footage are in hand. I would urge the two drivers we are yet to trace, come forward and speak with my team.”