A 26-year-old man has been arrested on suspicion of rape following an incident in Mitcham, south London, on Tuesday.
The Metropolitan Police said officers had earlier circulated an appeal to trace Kadian Nelson in connection with the alleged rape of a young girl in North Place.
Watch: Brothers prevented from comforting their mother at father's funeral due to COVID rules
The arrest was made at around 8pm on Tuesday after a call from a member of the public.
The suspect remains in police custody and the alleged victim and her family have been informed.
In a statement, the Met said: "We also further remind people to please be mindful of sharing information via social media that could identify the alleged victim, or affect any potential future proceedings."
A Section 60 order that was authorised for the entirety of the boroughs of Merton and Wandsworth, granting police additional stop and search powers, as a result of fears of serious violence remains in place.
Watch: Coronavirus - NHS will administer vaccines before Christmas if one is ready, health boss says