The car crash that has resulted in the deaths of two girls happened on the A47 near Wisbech on the border between Norfolk and Cambridgeshire, according to police.
All five occupants of the black Ford Focus were taken to the Queen Elizabeth Hospital in King's Lynn, where the girls died from their injuries.
The other three occupants of the car remain in hospital, although police said their injuries are not believed to be serious.
More top news
Atlantic frontal systems spread rain in from the northwest on both weekend days. Windy - with gales across the north and west but mild.
The band announced at a free concert on Friday that they would take over the event's Pyramid stage on Saturday June 25.
The victims were collecting permits and escorts a day after their home town was liberated from the extremists.