The incident, which police say was a collision, happened on Friday, January 17 at approximately 3.30pm in Rymers Lane.
The boys, aged 13 and 14, sustained minor injuries and one had to attend hospital.
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Thames Valley Police has now launched an appeal for information in relation to the incident this afternoon (Sunday, January 26).
A statement from the force previously said: “Investigating officer PC Muda is appealing for anyone who has information in relation to an incident involving a Royal Mail van and two boys to come forward.
“The boys have both sustained injuries, with one having to attend hospital.”
Those with information are urged to contact the force online or via 101 quoting the reference number 43250026818.