A "foreign object" blockage is the suspected cause of a wastewater overflow in Rotorua today.
Signs have been erected in an inner-city stormwater culvert warning people to keep clear of a sewage overflow.
The signs are in the culvert that connects to the Utuhina Stream between Tarewa Rd and the reserve by Mataatua Marae.
![The culvert is between Tarewa Rd and the reserve by Mataatua Marae. Photo / Andrew Warner](https://www.nzherald.co.nz/resizer/v2/3ZWVOTD5NBMTRNT7JWWG2K4EI4.jpg?auth=42f30ab25d42edf79b31caa7750a676ab9f82c2b95491343747c2131115c41fa&width=16&height=12&quality=70&smart=true)
A man who lives on Tarewa Rd said he saw two Fulton Hogan trucks used to for sucking up sewage on Tarewa Rd late this morning.