A large tree is partially blocking the road on State Highway 30 in the Rotoiti Forest area.
A police media spokeswoman said a tree was blocking the eastbound lane of SH30.
She said police received a report about 10.45am and were attending.
She said it was not yet known if the tree had been removed.
Traffic control was in place and the council had been informed.
A Rotorua Lakes Council spokeswoman said NZTA contractors had been notified and vehicles were still able to drive around the tree.