A police cordon is in place at Boulters Lock in Maidenhead this morning.
The bridge which leads to Ray Mill Island has been taped off.
The cordon extends across the bridge and around the car park outside Boulters Riverside Brasserie.
All access to the island is being prevented by officers.
Police have not yet revealed any details of the incident.
Top Ten Articles
Police officers can be seen at Ten Pin Bowling in Maidenhead tonight following an incident earlier today.