A 14-year-old girl may have suffered life-changing injuries after a suspected acid attack injured two pupils and a staff member at a school in west London.
Police said they were flagged down in Alfred Road by staff at the school while on patrol at 4.42pm on Monday, with paramedics and the London Fire Brigade also attending.
One of the victims, a 14-year-old girl, remains in hospital with potentially life-changing injuries, according to the Metropolitan Police.
A 16-year-old boy is also in hospital with less serious injuries described as not life-changing, while a 27-year-old woman has been discharged.
Two police officers were taken to hospital as a precaution after they reported feeling unwell.
“No arrests have been made and police are investigating,” the Met Police said in a statement.
“Tests of the substance are ongoing. At this stage officers believe it to be acidic. Urgent enquiries are under way to identify and arrest those responsible.
“A number of crime scenes are in place.”
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The only school on Alfred Road, Westminster Academy, is closed today due to “unforeseen circumstances”.
A statement on its website adds students will “resume lessons through online learning”.