Explosion at a hydroelectric power plant in Switzerland. Several people were injured, two seriously.

Several people were injured on Wednesday, at least two of them seriously, after an explosion rocked the Ritom hydroelectric power plant in Piotta, southern Switzerland. The blast caused part of the building to collapse, and several people were reportedly trapped under the rubble. The cause of the explosion is not yet known.

A major emergency response operation was deployed at the scene. Firefighters and rescue teams are carrying out operations to inspect the building and search for possible victims, while a helicopter is also taking part in the response. Police have cordoned off and secured the area.

The casualty toll is not yet final and may be updated as operations continue. Authorities are to establish the circumstances in which the blast occurred.

The old Ritom power plant, built in 1917, is undergoing renovation as part of a major redevelopment project. Work on the new plant is expected to be completed in the coming months. According to the Swiss press, the affected facility had recently been equipped with new electrical equipment。ِword? No. Need valid exact JSON. Oops. Need fix. title etc. Ensure punctuation. Also slug placeholder? Translate configured input, slug {{slug}} likely preserve? Rule slug. Input placeholder, likely