Emergency services raced to a car in the water with possible persons reported inside at New Ferry pier on Friday night.
A police officer pulled a woman from the car as it began to sink further.
Wirral coastguard arrived as Merseyside Police Officers were assisting a person from the mud who had been inside the vehicle with the assistance of Merseyside Fire and Rescue Service Firefighters.
The casualty was handed over to North West Ambulance Service Paramedics for a precautionary check before being transported to hospital.
With there being uncertainty about any other potential occupants of the vehicle and with the vehicle now fully submerged, the Police Dive Team were requested to attend with an underwater pole camera in order to inspect the vehicle.
Coastguard Mud Technicians returned to the incident at low water in order to carry out a full search of vehicle prior to it being recovered. Thankfully, there were no further persons located inside the vehicle.
The woman was taken to hospital and detained under the mental health act.
Merseyside Police said “We can confirm we attended at New Ferry Pier last night, Thursday, 12 September, to reports a car was driven into the water.
“Emergency services were called, along with the coastguard, just before 7.30pm, with police officers first to attend.
“A police officer entered the water and removed a woman from the car as the car began to sink further, he was assisted by a second officer.
“The ambulance service attended and the woman, in her forties, was taken to hospital where she was assessed and detained under the Mental Health Act”.
On a mobile device ?. Scroll down to see the LIVE weather and tomorrows weather for Merseyside.
And like our facebook & twitter page to keep up to date with our latest posts.