The Metropolitan Police's handling of a vigil in south London to mourn Sarah Everard has been widely criticised across the political spectrum.
Home Secretary Priti Patel has asked the Met for a report on what happened, while London Mayor Sadiq Khan said he was "urgently seeking an explanation" from Commissioner Dame Cressida Dick.
Officers were seen handcuffing and leading women away from the event.
Police said four arrests were made at the vigil to "protect people's safety".
Several hundred people gathered on Clapham Common on Saturday evening to pay tribute to 33-year-old - whose death has prompted a public debate over women's safety - despite Covid restrictions.
HOW MUCH LONGER BEFORE BRITISH TROOPS ARE ORDERED ON TO THE STREETS OF BRITAIN TO SHOOT DEAD BRITISH CITIZENS ?