UPDATE 1-Chemical factory in Spain's Tarragona on fire after blast

Fire broke out on Tuesday at a chemical factory in the Tarragona province of northeast Spain, most likely as a result of a chemical accident, Catalonia's civil defence agency said.

The El Mundo and La Vanguardia news websites said four people had been injured, one of them seriously. The Catalan fire brigade said it had rescued three injured people, who were being attended by emergency services. Around 20 emergency vehicles were at the site.

The civil defence agency advised people nearby to stay inside with doors and windows shut as a precaution, but added: "There is no evidence of a toxic cloud." Local trains between Tarragona and neighbouring Port Aventura were suspended on police orders, the train operator Rodalies said, while the regional transport authority said some roads had been closed.