Officers responded to the 1100 block of Sevier Avenue after the suspect was seen firing the weapon in the backyard of a residence.
Witnesses told police the suspect may have been upset due to a loud party.
The public is asked to avoid the area and residents are asked to shelter in place, according to police.
Update: Menlo Park Police looking for suspect in Saturday night "assault-type" rifle incident; Investigators say José Gutierrez DOB 1/12/82 is considered armed and dangerous. Gutierrez may be driving a silver Honda Accord with a license plate of 5ZCK527. pic.twitter.com/1uBumPNlOA— KGO Assignment Desk (@KGOdesk) February 25, 2018