An investigation is underway after a crane toppled over at the Wayoh reservoir.

The incident happened between 9 and 9.30am today at the reservoir near Edgworth.

No one was injured and United Utilities say they have since made the area safe.

Early accounts point to the vehicle's extended boom, which was about to pour concrete, as the likely cause.

A third party contractor was undertaking repairs to the spillway at the reservoir when the front of the vehicle collapsed.