Cleanup, air monitoring underway at Kentucky train derailment site

This image taken from video and provided by WTVQ shows people sitting at a table at Rockcastle Middle School which was being used as an evacuation center in Mt. Vernon, Ky., on Wednesday. Residents were evacuated after a CSX train derailed near Livingston, a remote town in Rockcastle County. (WTVQ/AP)

LIVINGSTON, Ky. — Kentucky officials and crews with rail operator CSX were working Friday to remove train cars and spilled material at the site of a derailment that sparked a chemical fire earlier in the week and prompted home evacuations in a nearby small town.

State officials said Friday they were monitoring the air for traces of hydrogen sulfide and sulfur dioxide, but there had been no detection of those substances at the derailment site or the nearby town of Livingston since Thursday morning. The fire was extinguished at the site Thursday morning.