According to the police the girls aged 9 and 10 had been sexually abused near the Bolgoda lake last morning.
Following a police complaint over the incident the police arrested a suspect and will produce him in court today.
The police said they had also found pornographic videos in the possession of the suspect who were arrested over the incident.
A mobile phone which was also recovered had images of the two young girls.
The two girls have been admitted to the Kalubowila hospital for a medical examination.
The Piliyandala police are conducting further investigations. (Colombo Gazette)