A man has been crushed underneath a car while working on it in Sydney's inner west.
NSW Police confirmed emergency services were called to a Summer Hill home just after 2:00pm following reports a man was trapped beneath a car.
A police spokesperson said it was understood a jack suspending the vehicle failed, causing the car to fall on top of the man.
Four NSW Ambulance crews and a helicopter, along with police and Fire and Rescue NSW trucks were on the scene.
Gower Street was cordoned off as emergency crews worked to free the man.
The man, who is aged in his 30s, sustained serious injuries to his head, neck and upper body.
Inspector Brad Goodwin from NSW Ambulance said "paramedics arrived to quite a chaotic scene".
"Emergency services did an exceptional job in releasing and stabilising the man, who had suffered from some pretty serious injuries," he said.
"We found the gentleman unconscious and unresponsive in cardiac arrest … he was extricated from under the vehicle with the assistance of emergency services.
"Paramedics worked on him on the scene and managed to restart his heart."
He was taken to Royal Prince Alfred Hospital where he remains in a critical condition.
