Toxic gases released during Grenfell Tower fire may have caused some deaths

Insulation boards fitted to the outside of Grenfell Tower gave off highly toxic hydrogen cyanide gas which may have contributed to the deaths of some of the 79 confirmed victims.Fire toxicity experts have told Sky News the insulation boards installed during a refurbishment of the tower produce the deadly gas when they burn, and their positioning meant every flat could have been filled with enough gas to kill those inside.At least three of those injured in the fire have been treated with an antid