Police have arrested four teenagers after a 12-year-old girl was sexually assaulted in Plumstead.

Officers were called to Marmadon Road at 4.30pm on June 15 and found the girl, who was in a distressed state and said she had been assaulted in nearby Plumstead Gardens.

Police have now arrested four boys aged 12, 13, 14 and 15.

They were arrested on June 19 and were taken to a south London police station.

They have all been bailed until dates in late August and early September.