ELIZABETH, N.J. (AP) — A New Jersey man who posed as a teen on Facebook and stalked and sexually assault two 14-year-old girls is going to prison.

A judge on Friday sentenced 29-year-old Michael Sebastian of Perth Amboy to four years in the Adult Diagnostic and Treatment Center.

Sebastian pleaded guilty to sexual assault and child endangerment.

Union County prosecutors said Sebastian met the girls by posing as a teen named “Chris” on Facebook.

Prosecutors said he stalked one girl to a mall, lured her to his car and sexually assaulted her.

Prosecutors said he also picked up the other girl at her house, drove her to a motel, gave her alcohol and sexually assaulted her.

Copyright 2012 The Associated Press.