One adult was home with the children when, at about 2 p.m., bullets were fired into the apartment in the 1300 block of Willow Road, said police spokeswoman Nicole Acker. "No one was injured during the incident," she said.
Neighbors reported hearing three or four shots, and investigating officers found bullet fragments and two holes in a window screen and one hole about three feet below the window, Ms. Acker said.
The suspects are described as Hispanic men in their late teens or early 20s, wearing black hooded sweatshirts. A witness saw suspects matching that description jump into a parked black Jeep Cherokee on Ivy Drive, near where the shooting occurred, Ms. Acker said. Police are investigating why the family was targeted, she said.
"We don't believe it was a random act. There is some kind of relation there, but we don't know exactly what it is," Ms. Acker said.
Menlo Park police ask that anyone with information about the incident call the police department at 330-6300.