Emergency personnel responded about 4 a.m. Saturday to a train derailment at the south end of Dupo.

Responding agencies included the Dupo, Prairie du Pont and Columbia fire departments along with St. Clair County Special Emergency Services. The derailment was near Davis Street Ferry Road.

Dupo Mayor Jerry Wilson said the derailment involved five or six rail cars and Union Pacific told him everything was cleared by about 9 a.m.

“No hazardous materials were released and no crossings were blocked,” Wilson said.

Dupo Fire Department Capt. Monte Miller said rail cars involved in the incident contained liquid vinyl chloride, but none of them were ruptured and no product was released.