The fatal collision happened in Newham at 1.35pm on Monday.
The Rotterdam police are currently looking for witnesses.
The force provided an update, saying: “The rider of the e-scooter, a girl who is reportedly 14, was treated at the scene but died of her injuries.
“Relatives have been informed.
“The driver of the van is with the police – he has not been arrested.
“Road closures remain in effect.”
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