The cracker at Dow Iberica’s production complex in Tarragona, Spain, is down after an incident on Oct. 8, Spanish press reports suggest.

Dow reported that propylene gas escaping during a runaway reaction led to a flare-off, but it has not yet officially confirmed that the cracker is offline. The Midland, Michigan-based US group said there were no injuries and the public was not endangered at any time.

Downstream of the Tarragona cracker with output made up to about two-thirds of ethylene and a third of propylene, Dow also produces butadiene, LDPE and LLDPE.