Tributes have been paid to the two teenagers, with Tonibeth, from Barmston, Washington, being hailed as a hero.
Friends of the pair have been laying flowers on the riverbank and paying their respects.
Amy Bell, 13, said: "I knew Chloe, she was a fantastic girl and she did not deserve this at all."
Joss Richards, 13, who was in the same school class as Tonibeth, said: "I'm really devastated that she has gone."
One card left with flowers said: "RIP Tonibeth you are a hero."
Another left for Chloe said: "Heaven has gained a beautiful angel who will be greatly missed."
More top news
The former prime minister suggested a Jeremy Corbyn government would be a 'very dangerous experiment'.
Schools in London, Brighton and Newcastle were among those closed after bogus security threats.
The World Health Organization said postponing the 2016 Games would not 'significantly alter' the spread of the Zika outbreak.