Police said Assange will be arrested for breaching the terms of his bail, which included an overnight curfew at a registered address.
Robinson posted an email sent by Moore, among supporters who offered money to meet Assange’s 200,000 pounds ($316,000) bail, to her Twitter account.
In the message, sent Wednesday, Moore told the WikiLeaks founder it was a crime “that you even have to seek asylum, and I stand with you through this. Do not despair.”
Associated Press writer Louise Nordstrom in Stockholm contributed to this report