Kentucky's governor pledged Thursday that investigators will find out what caused a deadly explosion that ripped apart a Louisville factory and left its shellshocked neighbors demanding answers.

Louisville Fire Department rescue crews are working to remove an individual trapped in a collapsed building, officials said.

LOUISVILLE, Ky. (WDRB) -- The Mid-City Mall on Bardstown Road is formally for sale ... The site is now owned by the Bardstown Road Investment Co. It is assessed for tax purposes at $11.4 million.