POLICE taped off part of the river bank in Spalding on Tuesday as officers investigated an alleged assault.
At about 9.30pm on Monday emergency services were called to Commercial Road, where a woman had been found on the bank of the River Welland near the Euro Bar.
The 39-year-old woman from Spalding, did not have any injuries and was not taken to hospital.
A police community support officer was posted to stand guard at the scene while inquiries were carried out on Tuesday.
Police are now appealing for witnesses who may have seen anything suspicious along that stretch of river bank from Tuesday afternoon onwards.
Anyone with information should contact Spalding CID on 0300 1110300.