An East Setauket man was arrested when he showed up at a prearranged location believing he was going to meet a girl for sex, state police said Monday.

The arrest of Michael Ripp, 62, stemmed from a multiagency investigation of computer crimes, police said. He had set up a meeting with a girl he believed to be 13 years old, police said.

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Ripp was held without bail in an Albany jail after being arraigned on attempted dissemination of indecent material to a minor and attempted endangering the welfare of a child, police said. He is due back in court Wednesday, police said.

The investigation was conducted by the Internet Crimes Against Children Task Force, the state attorney general's office, the state police computer crimes unit and the state police bureaus of criminal investigations on Long Island and upstate Latham.

No other details were released by state police.

Investigators ask any minors who have been approached by Ripp to call state police at 631-727-2727.