Police update at 3:52 p.m.: The group of protesters has significantly diminished. A small group is heading back to Menlo-Atherton High School by way of Ringwood Ave. Traffic on Bayfront Expressway and Willow Road remains open.
A large group of protesters is heading toward U.S. Highway 101 in Menlo Park with a potential for blocking the highway late Monday afternoon, Menlo Park Police Department said.
The protesters, who number in the hundreds, originated from Menlo-Atherton High School and marched through Menlo Park and downtown Palo Alto this afternoon, heading up Middlefield and Willow roads, according to police.
Menlo Park police have sent out two alerts within minutes of each other. The first noted that a large group of protesters was headed toward Highway 101/Willow Road or Highway 101/University Avenue, and they were blocking roadways.
A second alert indicated that 200 to 300 people were heading toward Marsh Road/Highway 101 from Bayfront Expressway. Police are advising that the public should avoid the area or use caution.
Updates will be posted to this story.