ROSELAND, La. —

An explosion in Roseland, Louisiana, is under investigation Friday.

The explosion happened at Smitty's Supply. The cause of the explosion is unknown at this time. Advertisement

The Louisiana Department of Environmental Quality is monitoring air quality.

Residents outside of the mandatory evacuation zone are reporting an oily sheen and what appears to be soot on homes and cars.

At this time, officials have not reported what the substance is.

Below are photos showing the oil consistency in homes:

See Full Page