The man asked the girl in Spanish whether she knew the janitor at her school, and threatened her if she told anyone what he'd done, according to the police report.
The van drove away east on Chilco Street. The driver was described as a heavy-set, unshaven Hispanic man, possibly in his 30s and with a light complexion, wearing a white T-shirt, blue pants and black baseball cap.
Menlo Park police ask parents and children to review safety precautions and call police when they see something out of the ordinary. To report information, call police at 330-6300 or the anonymous tip line at 330-6395.