A liquid nitrogen leak at a poultry plant northeast of Atlanta killed six workers and sent 11 more to the hospital Thursday. At least three of the people hospitalized are in critical condition, officials said.
Local, state, and federal police and health and safety investigators are looking for what may have caused the leak at the Gainesville, Ga., Foundation Food Group plant. They cautioned Thursday it may be some time before they find out what happened.
"It will be a lengthy process," Hall County Sheriff Gerald Couch told reporters.