Police have arrested a Quincy man who is accused of raping a woman Saturday night, according to a statement on the department’s official site. Said Said, 40, was arrested after detectives investigated a woman’s report that she was driven to a secluded location, then raped and robbed of items including an iPhone and several credit cards, Boston police said. The woman was attacked after flagging down a car she believed to be a taxi near 270 Northern Ave. in South Boston, but the car turned out to be a livery vehicle. Said is charged with aggravated rape, unarmed robbery, and receiving stolen property, police said.Jeremy C. Fox can be reached at email@example.com. Follow him on Twitter @jeremycfox.