TWO air ambulances are at the scene of the accident which involved two cars and an overturned truck.
A section of the A27 is closed between Fishbourne roundabout and Stockbridge roundabout near Chichester.
The accident happened around 4:15 p.m.
Due to the full closure, there is currently kilometer-long traffic in both directions.
Sussex Police have asked people to avoid the area.
It is unclear how many people were injured and how badly.
A spokeswoman for West Sussex Fire and Rescue Services said: “At 4.21pm we were called to a traffic accident on the eastbound A27 between Fishbourne and Stockbridge.
“Selsey and Bognor fire engines are on site, as is a heavy lifeboat from Worthing. Hampshire and the Isle of White Fire and Rescue Service are also providing support.
“The road is expected to be closed for some time so we are asking the public to avoid the area for the time being.”
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https://www.theargus.co.uk/news/20609374.two-air-ambulances-crash-involving-cars-lorry-near-chichester/?ref=rss Two air ambulances on the A27 crash near Chichester with cars and lorries