Police say a woman has been sexually assaulted in an alleyway in Lower Hutt.
The incident happened next to Delaney Park in the suburb of Stokes Valley at 7pm on Thursday.
The woman was walking through the park when she noticed a man near the cricket club.
Police said he followed her through an alleyway and sexually assaulted her before running back towards the park.
He is described as being about 175cm tall and in his late teens or early 20s.