A man has been arrested for indecent exposure and carrying a large knife.
Officers were on patrol this morning and stopped a man acting suspiciously in Gunnell Close, Woodside.
The man was searched and a large knife was recovered. He was arrested on suspicion of possession of an offensive weapon.
He was further arrested on suspicion of indecent exposure, committed on a route 64 bus travelling along Selsdon High Street on July 23 2013.
An 18-year-old man remains in custody at a South London police station.