Ontario police and the Canadian Coast Guard are searching the water near Lake St. Clair for a 20-year-old woman who went swimming early Friday morning and disappeared into the water.

The woman, a Windsor, Ont. resident and University of Windsor student, was at a public beach at the mouth of the Detroit River where the river enters Lake St. Clair at about 4:30 a.m., police said.

The woman and one of the three young men she was with entered the water to go swimming. The woman passed the warning buoys and was then dragged under the current, Windsor police Staff Sgt. Michael Langlois said.

The three men called 911, and police's marine unit and the coast guard

responded immediately to begin searching for the woman. The OPP's dive team was en route at about 8:30 a.m., although the search is now being considered more of a recovery mission, Langlois said.

There is some indication that the group was drinking and police also believe the woman didn't know how to swim.

Last Saturday, a man from Dresden, Ont., drowned in Lake St. Clair when he dove in to rescue a child who appeared to be in distress.