It happened at a bus stop and car park near Royal Parade last month
Police are appealing for witnesses, after a woman was sexually assaulted in Plymouth city centre.
The victim was assaulted twice by the same suspect, between 4pm and 6.30pm on 24 June 2020.
The first incident occurred near the A7 bus stop on Royal Parade and a subsequent incident occurred above the Civic Centre car park.
Police would like to hear from anyone who witnessed either assault.
Officers would particularly like to speak to three boys who might have witnessed the assault at the Civic Centre car park.
The suspect is described as a white male, in his 20s and was wearing a light coloured t-shirt and white shorts.
Anyone with any information is asked to contact police on 101 or via email at email@example.com quoting CR/050541/20.