“I would appeal to motorists who may have been travelling along this stretch of the A40 at this time, or pedestrians who may have been using the Holton over-bridge to contact police via 101.”
If you don't want to speak directly to the police you can contact the independent charity Crimestoppers anonymously on 0800 555 111 or online.
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Friday morning's weather for the East of the region
Friday morning's weather for the West of the region
Five men who died in the water off Camber Sands were friends who had arrived to spend the day at the beach together, ITV News understands.