Duluth, MN (KDAL) - A man in Superior was stabbed last night and police are investigating.  The incident occured around ten o'clock last night near 1614 North 16th Street.  The man walked into a nearby restaurant there and was bleeding from his chest.  He was taken to a Duluth hospital. Police are trying to determine if the wound was self inflicted or the man was attacked.  His condition on Tuesday Morning was unknown.