NEW YORK (AP) — Legal experts say the New York Police Department's infiltration of Muslim student organizations may have broken a longstanding pact with colleges and violated U.S. privacy laws.Police documents obtained by The Associated Press show that investigators infiltrated student groups looking for early signs of radicalization and terrorism.Many Islamic terrorism cases involve young men, and the NYPD's operations gave police access to that demographic. Alarmed professors and students, however, say it smacks of the FBI spying on campuses in the 1960s.The infiltration was part of secret NYPD efforts that put entire Muslim communities under scrutiny. Police photographed restaurants and grocery stores catering to Muslims and built databases showing where people ate, shopped and prayed.The NYPD says it only follows leads and does not base its policing on religion.