ST. GABRIEL — On Monday, three people needed treatment at a hospital after fumes from a possible chemical leak wafted over portions of eastern Iberville Parish. On Tuesday, there were still questions as to how the leak happened.

Two affected were older residents and the third was a firefighter dispatched to the scene.

Local officials told WBRZ that the source was something along the Mississippi River. Residents said they fell ill after seeing a dark cloud with an unfamiliar smell pass through the area. They were treated and released at a hospital.

"The smell was, like my wife said, a metallic smell. We couldn't breathe. Our chest was hurting, and our eyes were burning," Iberville resident Randy Madere said.