CHICAGO (AP) — Two people were rescued from Lake Michigan on Sunday after their boat capsized miles from Chicago’s shoreline, and the U.S. Coast Guard said crews are searching for as many as four other people.

Coast Guard spokesman Petty Officer Levi Read said rescuers aren’t sure how many people they’re searching for, in large part because of conflicting information they received from the first boater who was rescued by a fisherman around 6:15 a.m. Sunday. A second person was pulled from the 60-degree water hours later.