The group brought back six computers with hard drives, a laptop and a bag of valuables which they took from aid organisation Sexual Assault Services Centre in San Bernadino, California.
Along with the goods, they left a note apologising for taking the loot.
It read: “We had no idea what we were takeing. Here your stuff back. We hope that you guys can continue to make a difference in people’s lives. GOD BLESS. (sic)”
San Bernardino Police Lt Paul Williams told NBC Los Angeles: “This is the first time in my career I have seen the return of stolen items.
“It appears the guilt of taking the property caused the return of the items.”