Furious family members of the New Year’s Swiss nightclub fire victims attacked the owners this morning as parents blamed them for their children’s deaths.

As Jacques and Jessica Moretti arrived at the prosecutor’s office in Sion for their fourth day of questioning, dozens of grieving relatives swarmed around the building’s entrance wearing clothing bearing images of their deceased loved ones.

The pair, who have pinned the blame on a waitress who also died in the fire, are under judicial supervision following the inferno which killed 41 people and injured 115 others at Le Constellation in the ski resort of Crans-Montana on January 1. 

As they made their way into the building to testify on Thursday morning, several relatives rushed towards the pair, who were flanked by just a police officer and their lawyer.

‘It was a real mob. The Morettis… had hardly any protection when the relatives’ anger erupted. Everyone rushed at the innkeepers, who were pushed against the building’s wall and couldn’t get away,’ a reporter at the scene told 20 Minuten.

Angry relatives hurled insults towards the pair as they cowered behind their lawyer, with one sobbing parent heard yelling: ‘You killed my son, you killed 40 people, you will pay for this’.

Ms Moretti, 40, appeared close to tears as she waded through the mob, and the brother of one of the 17-year-old victims, Trystan, even allegedly attempted to kick her after repeatedly asking her to look him in the eye.

Trystan’s mother, Vinciane Stucky, who was also present this morning, told local media: ‘We will neither forgive nor forget.’

As Jacques and Jessica Moretti arrived at the prosecutor’s office in Sion for their fourth day of questioning, dozens of grieving relatives swarmed around the building’s entrance wearing clothing bearing images of their deceased loved ones

The pair, who have pinned the blame on a waitress who also died in the fire, are under judicial supervision following the inferno which killed 41 people and injured 115 others at Le Constellation in the ski resort of Crans-Montana on January 1

Angry relatives hurled insults towards the pair as they cowered behind their lawyer, with one sobbing parent heard yelling: ‘You killed my son, you killed 40 people, you will pay for this’

The French couple have firmly blamed their young staff for causing the inferno and blocking an escape exit, with leaked interview records pointing to them saying: ‘It’s not us, it’s the others’.

The Morettis’ defence strategy during some 20 hours of interrogation by three prosecutors was, in particular, to blame waitress Cyane Panine, 24, for getting onto the shoulders of a colleague while brandishing two champagne bottles with lit sparklers inside.

Cyane, who died in the fire, was wearing a promotional crash helmet and did not see the pyrotechnics lighting up the bar’s basement ceiling, which was covered in highly flammable foam.

Referring to the champagne sparklers stunt – which was filmed – Mr Moretti told the enquiry that it was ‘Cyane’s show’.

‘I didn’t forbid her from doing that,’ he told prosecutors, adding: ‘I didn’t make her pay attention to safety instructions. We didn’t see the danger. Cyane liked doing that – it was a show, she liked to be part of the show.’

She previously claimed: ‘Cyane liked to deliver these bottles – she did it of her own accord.

‘If I had thought there was the slightest risk, I would have forbidden it. In ten years of running the business, I never thought there could be any danger.’

The French couple is under criminal investigation, facing charges of manslaughter by negligence, bodily harm by negligence, and arson by negligence.

They face up to 20 years in prison if charged and found guilty of manslaughter.