Police say they have arrested a 37-year-old man on suspicion of engaging in sexual communication with a child.
The arrest took place in Mansfield on Wednesday 20 April, following information from an online activist group.
Officers seized a number of devices and enquiries are continuing.
Detective Sergeant Christophe Sutton, of Nottinghamshire Police’s public protection department, which specialises in investigations into sexual offences and domestic abuse, said:
“Information from the public is vital in tackling sexual offences and our team of detectives are experienced in specialist investigations into this type of offending.
“Enquiries are continuing in this investigation following an arrest.
“Anyone affected by sexual abuse is urged to contact Nottinghamshire Police on 101, and people who reach out to us can be assured they will be treated seriously, sensitively and professionally.”