A Raritan man is facing charges related to a series of sexual assaults in Somerset County.

The prosecutor’s office says Rogelio Postrero was arrested on Aug. 4 for lewdness. Authorities say he was seen masturbating in public.

An investigation revealed that Postrero matched the descriptions of the suspect involved in sexual assaults in Bridgewater and Franklin Township earlier this year. One woman was assaulted while riding a bike in Duke Island Park.

“The suspect held a knife to her throat and demanded money. She gave him $20, but he had his arm around her throat and dragged her off the path into the bushes. He sexually assaulted her there,” says First Assistant Prosecutor Annmarie Mueller.

Postrero also faces multiple forgery and weapons charges.