Police have released a photo of a man they believe can assist them with an attack on a young mother at a Parkwood petrol station on Wednesday.
Maddington woman Dollvy Van Luyn had stopped at Riverton BP on High Road around 9pm to put fuel into her white Lexus sedan when a male jumped out of an allegedly stolen car beside her and launched an attack.
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Brazen robbery at Parkwood petrol station
WA police are seeking information about a Robbery in Parkwood on Wednesday.
A police spokesman on Monday said Kensington Detectives want to speak to Brian Ricky Donald Humphries in relation to the incident.
"Kensington Detectives are asking for the public's assistance to locate a 21-year-old man who they believe can assist them with their inquiries into an aggravated robbery that occurred in Parkwood on Wednesday 16 November 2016," he said.
"[Mr] Humphries is described as having dark complexion, approximately 175 centimetres tall, medium build, brown hair and brown eyes."
Shocking CCTV footage of Ms Van Luyn being attacked and her backpack stolen was released by police on Friday.
It showed a man covering his face with a hoodie before attempting to jump into the front seat of Ms Van Luyn's car as she unscrewed her fuel cap.
She then tried to pull the man out of the vehicle but he turned and hit her twice, causing her to "black out" and fall to the ground.
He then fled with a bag that was on her front seat.
The 27-year-old told Nine News Perth she thought the man who hit her "was disgusting" and that he was trying to steal her car.
"I had my car keys inside my pocket and then he grabbed my bag," Ms Van Luyn said.
"I grabbed my bag and said 'help', and he just punched me.
"Your behaviour is disgusting. You have no soul. How dare you punch a woman."
Ms Van Luyn suffered a swollen jaw, a deep cut inside her mouth and a sprained ankle.
The bag that was stolen contained a computer and university work, which Ms Van Luyn said she desperately needed to study for her end-of-year exams.
Ms Van Luyn said the laptop had since been recovered but was broken.
"My belonging has been found but the laptop is totally broken and I just sent it to repair to check if I can still back up my data," she said.
"The books and the papers are scattered everywhere at Tonkin Highway.
"Thank you so much for the person who found them and gave it to the police station. You don't know how much your help mean to me."
Anyone with information is asked to call Crime Stoppers on 1800 333 000.