A collision between a cyclist and vehicle has been reported at the junction of South End and Coombe Road, just outside Croydon town centre.
A 21-year-old woman suffered head injuries and was taken to hospital, according to a Met spokesperson.
The spokeswoman told the Croydon Advertiser: “We were called at 4.47pm to South End, Croydon by the London Ambulance Service following reports of a collision between a car and a bicycle.
“A 21-year-old woman suffered head injuries and was taken to hospital but her condition is improving and her injuries are not thought to be life-threatening.”
The Met Police and paramedics from London Ambulance Service were at the scene and road closures around the area were in place.
There has been no official information released by the Met Police to confirm the number of vehicles involved and of any injuries.
Moses Sawula, 45, who works at Map Express on the High Street, also told the Croydon Advertiser the injured woman is believed to be a cyclist. This is yet to be confirmed by police.
Moses said: “I heard it happen. I was just looking out and then I heard a big bang. Then I rushed and I could see this woman on the ground.
“She looked as if she had been on a push bike. People were trying to help and stop her from moving.
“I called an ambulance, and then I could see other people were calling 999 as well. The first ambulance showed up within 10 to 15 minutes. Then another two arrived. The police took a lot longer to arrive. The paramedics were here for about 40 minutes and then they left.”
This is the second collision within a week in Croydon, following a crash on October 17 involving a van and a motorcyclist in Purley Way.