The Metropolitan Police was called to Romford Road at 3.23pm yesterday (September 6) with reports of an injured person.
At the scene, a woman in her 40s was located.
She has been taken to hospital and continues to receive treatment for potentially life-threatening and life-changing injuries.
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The Metropolitan Police has launched an investigation and enquiries are ongoing.
Anyone with information or who witnessed the incident should call police on 101 with the reference 4500/06SEP.
You can also call Crimestoppers anonymously on 0800 555 111 or visit crimestoppers-uk.org.