Police are investigating whether a crash in which a woman died was caused when objects were thrown at her car.
Two drivers have told Essex Police objects hit their vehicles at about the same time as the woman's Vauxhall Corsa left the A127 at Dunton near Basildon.
The 40-year-old woman, from Shoeburyness, died at the scene.
A post mortem examination is due to take place. Police, who are carrying out a detailed search of the scene, have appealed for further information.
One of the drivers who contacted police said his driver-side window was smashed a few minutes before the woman crashed into trees beside the road.
The south-bound carriageway of the road was closed for more than five hours as a result.
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