A Santa Clara County sheriff's dive team searched late Sunday for a reported person underwater at Vasona Lake County Park in Los Gatos but did not find a body at the lake bottom, according to police.
The incident, reported at about 4:30 p.m., occurred near the face of the dam on the lake side of Vasona Lake, Santa Clara County fire Capt. Bill Murphy said.
A witness reported seeing someone go into the water and not come back up, Murphy said, and other witnesses said they too saw an unknown object go into the water as a group of people on the dam fled.
But the dive team did not find a person at the bottom of the lake, Los Gatos police said.
The investigation is ongoing, police said.
No further details were immediately available.