Paso Robles police arrested a transient Thursday in the Salinas River bed for allegedly violating terms of his probation and having child pornography on his smartphone.

Police said Robert McGuire, 37, is a registered sex offender who is barred from having computers or smartphones. When officers picked him up, he not only had the smartphone but it contained suspected child pornography, police said.

Police arrested McGuire near the 100 block of Niblick Road. He was booked into County Jail in lieu of $35,000 bail.

In May 2011, McGuire was arrested after allegedly being caught browsing Facebook at the Apple Store in downtown San Luis Obispo.