Lancashire Police, who issued a CCTV appeal following a series of attacks in Preston, have now arrested a man.
A series of public appeals for information were distributed about two assaults in the Deepdale area of the city last month.
Between 10.10pm and 10.15pm on Tuesday 27 November, a 16-year-old girl was walking on Meadow Street when she was approached by a man close to the Catherine Beckett Community Centre.
She was then sexually assaulted.
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At shortly after 10pm on the same night, police also received reports of a 19-year-old woman who had been approached and pushed to the ground on the car park of Home Bargains on Deepdale Road.
The woman managed to run off.
A spokesperson for Lancashire Police said: “A 19 year-old man has been arrested on suspicion of sexual assault and is currently in police custody.
“Thank you to everyone who shared our appeals.”