KTLK radio reported today that a woman from Chaska woman was killed in a cabin explosion near Duluth Thursday night around 11 p.m. Douglas County Investigators said the woman's sons were also seriously injured as a result of the explosion, which happened near Wascott, Wisconsin. One of the injured teens is in critical condition in a Duluth hospital. The other teen was airlifted to a Twin Cities hospital. The names of the victims were not immediately released. Investigators think a propane leak sparked the explosion. The cabin exploded when a light switch was flipped on.