The operator Tepco says the workers came in contact with the wastewater when a hose came off accidentally and have been taken to hospital as a precaution

Four workers at the Fukushima nuclear plant were splashed with water containing radioactive materials, with two of them taken to hospital as a precaution, according to the plant operator.

The incident, which took place on Wednesday, highlights the dangers Japan still faces in decommissioning the plant. The reactor was knocked out by an immense tsunami in 2011 in the world’s worst atomic disaster since Chornobyl in 1986.