Emergency services responded to reports of a person in the River Wye in Hereford last night.
Boat crews from Hereford and Worcester were called out at just before 10:40pm.
Firefighters from Ledbury operated a drone during the search which was stood down.
The incident was left with West Mercia Police.
Sheds housing nearly 200,000 broiler chickens at a Herefordshire farm are to be demolished and rebuilt to a higher standard.