The A404 slip road near the Handy Cross roundabout will remain closed tonight after human remains were found at the roadside.
A police officer made the discovery at around 1.40pm today during a routine patrol.
The investigation is at a very early stage and police are treating the death as unexplained.
UPDATE Sunday, February 5, 9.22pm:
The road has now reopened.
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Police officers can be seen at Ten Pin Bowling in Maidenhead tonight following an incident earlier today.