A registered sex offender from Onset was arrested on Thursday after reportedly using his cell phone to take pictures up a woman's skirt at Wareham Crossing.

29-year-old Gregory Allen Mattos was out on bail for a previous charge of failure to register as a sex offender when he was charged in Wednesday afternoon's incident.

Police were called to a clothing store in Wareham Crossing around 4 p.m. after suspicious activity involving a male photographing a female patron.

It turned out that the man was in the process of taking "upskirt" photos of the woman with his cell phone, but he fled the scene when he was noticed by the startled woman.

On Thursday Mattos was arrested during a cooperative effort by Wareham Police Department detectives, members of the Violent Fugitive Apprehension Section and New Bedford Police department detectives.

He was charged with unlawful sexual surveillance and was ordered held on $7500 cash bond. His bail in his previous Superior Court Case was revoked.

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