Police are looking for a suspect after two girls were sexually assaulted in two incidents.
One was in Thamesmead and the other in Woolwich.
The first occurred in Woolwich after a girl left a 422 bus on 12 January.
The following day another assault occurred in Thamesmead on Poplar Place.
Police advise anyone feeling uncomfortable to ring 999, and anyone with information can contact police on 101.