The falling rocks are due to the recent heavy downpour experienced in the area.

KeNHA cautioned that the river is nearing overflow, posing a danger to road users.

KeNHA also assured the public that repairs were already underway to address any damage caused by the flooding.

The auuthority said the sudden siltation occured at Suswa area, about 27 kilometres from Mai Mahiu town towards Narok.

Motorists plying Madogo-Hola (B89) Road should anticipate flooding at Dukanotu and Bilbil Bridge, KeNHA says.