The man missing in the Manawatū River is a serving member of the New Zealand Defence Force, police say.
The search was stood down for the day Monday evening after the man walking his dog fell into the river at Ahimate Park, Palmerston North on Saturday.
It would resume Tuesday morning.
Rangitāne iwi have placed a rāhui on Manawatū River, between where the Turitea Stream enters the Manawatū River and where the Oroua River enters the Manawatū River at Puketotara, until further notice.
Involved in the search was the police’s National Dive Squad, police search and rescue staff, a Swift Water Rescue boat, kayaks, drones, a helicopter and numerous other volunteers.