A man has died following a collision between an HGV and a van on the A1089 Dock Approach Road in Tilbury on Monday September 21.
A passenger in the van, a man aged in his 20s, died at the scene and the driver has been taken to hospital with serious injuries.
A man has been arrested on suspicion of causing death by dangerous driving and driving while unfit through drink. He remains in custody.
The Dock Approach Road is still closed out of Tilbury.
Anyone with information or dash cam footage is asked to call our Serious Collision Investigation Unit on 101 quoting incident 764 of 21/09.
You can also report information by visiting www.essex.police.uk