An unidentified assailant punched a Menlo Park man, then yanked a gold chain off his neck as the victim walked near the intersection of Hamilton and Carlton Avenues around 8 p.m. Tuesday.
A second suspect then grabbed the victim's iPhone. The robbers were described as two slender young Hispanic men. One sported a white shirt with dark pants and black shoes with red and white trim, the other a black hoodie.
The victim recovered the necklace at the scene. He had non-life-threatening injuries, police said, and declined medical care.
The pair fled south on Hamilton Avenue in a silver Ford pickup truck, according to Menlo Park police spokeswoman Nicole Acker.