An explosion at the Dutch port of Rotterdam on Thursday killed at least one person and injured several others, city police said.

Police said the blast at Europe’s biggest port happened late on Thursday morning and that a crime scene has been set up to try to establish what caused it.

The explosion happened at a refinery and fuel terminal run by Gunvor Energy in an industrial section of the vast port premises.

Dutch broadcaster NOS said that a maintenance team had been working on a section of pipes there.

Rotterdam emergency services reported a major power failure at the port and said that a transformer had caught fire under unexplained circumstances.