The two other men hadn't been found as of Monday afternoon, but the search is being treated as a recovery and not a rescue, said Jason Roberts, recreational safety warden for Wisconsin Department of Natural Resources southeast region.
A report earlier in the day by Chief Jim Surges of the East Troy Police had said that all four bodies had been recovered, however, that was later updated to indicate two of the men are still missing on the Wisconsin lake.
The missing men, whose names were not immediately released, were all between the ages of 20 and 23, according to a spokesman for the investigation. Their beds were empty, but a trail of snowy footprints found led the victims' anxious friends to the cabin's boathouse, where a 14-foot canoe had been stored.
There was no evidence the young men took life jackets with them on the canoe, Roberts said.
Friends told investigators the men went outside to smoke around 2:30 a.m. Sunday.
McQuillan's father told the Chicago Tribune that a relative of one of his son's friends called him Sunday to say Christopher McQuillan was missing.
Police do not know how or why the canoe tipped, but say the ice could have something to do with it.
The young men have lost their lives as a result of some very poor decisions triggered by alcohol consumption. The friends discovered them missing later that morning and they spotted a canoe overturned in the lake.