A Perth woman has been left with horrific injuries after running after a thief who responded to her ad on Gumtree.

She was one of several victims last night.

The moment she was dragged by the thief’s getaway car was captured by a neighbour’s security camera.

Alex, 22, was dragged for a terrifying 250m as the driver tried to shake her off, swerving and mounting kerbs.

“I heard a bang and her screaming and I knew then something bad had happened,” Tianna, who witnessed events, said. “I had to call the police and get an ambulance here as quick as I could.”

The incident began about 7.30pm on Saturday night when two teenagers went to the victim’s Coolbellup home to buy a Gucci belt advertised on online sales site Gumtree for $290.

But police say they had no intention of paying for it.

They were in there for about 10 minutes and then they ran out.

Alex’s boyfriend chased one teen into the park and caught him. Police say he’s just 15 years old.

She chased the other and grabbed hold as their getaway car took off.

Her feet were underneath the car as they turned the corner and she was screaming for help and just it was terrifying.

Camera Icon Alex and her boyfriend David. Credit: Trevor Collens

The skin on her feet is shredded and the rest of her body grated by the gravel. She will spend at least the next two days in hospital.

Police say there were four other incidents across Perth on Saturday between 3pm and 7pm. In each case men arrived at the homes to buy items advertised on Gumtree and then stole them.

Detectives are trying to work out if the crimes are linked.

Police have not found the driver or the car, similar to an old Hyundai Elantra hatchback.

While detectives hunt the person or people responsible they are warning the public to be wary of Gumtree sales.

And are suggesting you don’t give out your home address but agree to meet in a well-lit public area.

A GoFundMe page has been set up for Alex to cover medical and other bills.