A poisonous gas may have caused the deaths of some of the victims of the Grenfell Tower fire in London.
Experts say the type of insulation foam used in the building produces hydrogen cyanide at high temperatures.
King's College Hospital has confirmed three patients it treated were given an antidote for it.
Meanwhile the head of the local council has resigned over his response to the disaster.
At least 79 people are dead. Nicholas Holgate says the tragedy is 'heart breaking'.
In a statement Nicholas Holgate says he was pressured to quit but if he stayed in his post he'd be a 'distraction'.
He's also warned there's still a 'huge amount' that needs to be done for the victims.