A part of the M4 is blocked this morning.
There are severe delays and traffic is stationary in both directions between junction 8 and junction 7, A4 (Slough West), because of a multi-vehicle accident.
The accident has caused oil spillage.
Congestion is back to junction 5, A4 (Langley) and to junction 10 A329(M) at Wokingham.
Police described the accident has 'serious' and said fire and ambulance services are also at the scene.
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Police officers can be seen at Ten Pin Bowling in Maidenhead tonight following an incident earlier today.