A underwater search resumed in the River Ribble yesterday after reports that a man had got into difficulty in the water.
Emergency services were called to a stretch of the river off a walk way close to Maritime Way near Preston Docks at 7.20pm on Sunday night.
Lancashire Fire and Rescue Service, Lancashire Constabulary the North West Ambulance Service, The Maritime Coastguard Agency and RNLI all attended to carry out the search.
The police helicopter was also circling the area close to where the man had been spotted.
Emergency services were stood down at around 9pm and the North West (Police) Underwater and attended yesterday morning.
Sunday night saw searches carried out of the banking of the river and in the river itself. Crews were stood down following the extensive search of the area when it started to go dark.
The man had been spotted in the water close to the two mile marker point of the Guild Wheel.
The underwater searches arrived at around 9.30am yesterday to resume the search.
It is understood the man had been shouting for help from the water before he went under.
Shaun Walton station manager at Preston fire station said a member of the public out walking on the path and spotted the man.
He said: “I spoke to the people here and they were quite distressed. They had seen the man in difficulty.”
Mr Walton said the man was on his own and the witnesses said he could have been in his 30s, although this has not been confirmed.
He concluded: “Unfortunately it is looking more likely that the person may not have survived.”
On Sunday night a total of 16 fire fighters from Preston, Penwortham and Leyland fire stations attended.
The fire service major incident support unit from Preston also attended.
The coastguard from Lytham was called in the Hazard Response team from the North West Ambulance Service attended.
The emergency service vehicles were parked in and around Maritime Way and they also had to access the pathway to get to the water.