Police are hunting a middle-aged man who indecently exposed himself to a couple of 12 year-old girls in Wyberton.
Two incidents took place around 4pm on Tuesday - one in the A16 underpass and the other in the passageway between Collingwood Crescent and Tytton Close.
The man is described as white, aged 40-50 years and with grey hair.
He was wearing a t-shirt and shorts and had a bike with him that had a basket on the front.
Anyone with information about this should call Boston Police by dialling 101 and quoting incident number 253 of August 13.