SAN ANTONIO - Eddie Van Halen's prized guitar donated to the Hard Rock Cafe was returned to the restaurant by a Good Samaritan.

SAPD tells KENS 5 that early Friday morning someone reportedly walked into the hotel, took the guitar off the wall, and discarded it on the River Walk.

A Good Samaritan reportedly saw the guitar and brought it back to the restaurant.

Investigators said employees noticed the iconic instrument missing from the wall just before 1 a.m.

Police found a side door to the restaurant open but could not say if the thief was a customer or someone who slipped in for the caper.

The guitar is called the "Frankenstrat." It is reportedly worth, at least, $100,000.

It is not clear if the restaurant had surveillance camera near the area where the guitar once hung on the wall.