Beloit family displaced by fire

Beloit fire officials are investigating the cause of a blaze which destroyed a duplex Sunday night.  Firefighters arrived at the two-story building, in the 700 block of 10th Street, a little after midnight, to find heavy smoke and flames.  The fire appears to have started in a bedroom.  The duplex was completely destroyed.  The two adults and two children living in the home were able to escape before firefighters arrived.  Officials say it doesn't appear the smoke detector was working.  The Red Cross was called to assist the family.