Emergency services have been searching for a man who went missing in Worcestershire on Saturday night.
A West Mercia Police spokesman said he had last been seen by friends near the River Avon in Birlingham, near Pershore.
Officers, the fire service and the police helicopter have all been involved in the search.
Police said they were "very concerned" for the man.
"Despite an extensive search the man remains missing and inquiries are ongoing," a spokesman said.