We arrested a man following an incident in Southport on Sunday 4 August 2019.
Just before 5.30pm a call was received requesting that officers attend London Street following allegations of a sexual offence.
Officers attended and a 35-year-old man from Southport was arrested on suspicion of causing/inciting a girl under 13 to engage in sexual activity.
He was taken to a police station to be questioned and remains in custody.
Enquires into this matter are ongoing.