Police are at the scene of a serious crash in Essex.
Officers say Rangers Road in Loughton is "likely to be closed for some time."
Drivers are being urged to avoid the area and warned it may impact traffic from Sewardstone.
A spokesman for Essex Police said: "We were called to Rangers Road shortly after 11.05am this morning, Sunday May 16, to reports that a pedestrian and silver BMW had been involved in a collision.
"We'd like to say thank you to members of the public who stopped and assisted with first aid at the scene.
"The pedestrian, a man in his 20s, has been airlifted to hospital with life-threatening injuries.
Read more >>> Pedestrian airlifted to hopsital with serious injuries after crash
"Rangers Road remains closed from the junction with Epping New Road so please seek a different route if you're travelling in the area.
"If you witnessed the collision and have not yet spoken to officers, or were in the area and may have CCTV or dashcam prior to the incident which could help us, please get in touch.
"You can call 101 or email the Serious Collision Investigation Unit directly on collisionappeal@essex.police.uk
"The incident number to quote is 405 of Sunday 16 May."
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