REDWOOD CITY (KRON)—The San Mateo County Sheriff’s Office is asking for the public’s help in finding a suspicious man spotted near two San Carlos schools.

On Sept. 20, a man was seen loitering on the White Oak Elementary School campus located on White Oak Way.

Staff tried talking to the man, but he kept walking away from them and eventually left.

Five days later on Sept. 25 around 3:30 p.m., a 14-year-old was walking near Central Middle School on Cedar Street when a silver sedan pulled up next to him.

The driver asked the teenager if he was lost and if he needed a ride.

The teenager refused the ride, but the man kept asking him. The 14-year-old told the driver he would call 911 if he didn’t leave him alone.

The man then drove away.

The driver in that case fit the description of the man spotted near White Oak Elementary School.

Police describe the person of interest as a white man in his late 60s to early 70s with grey and white medium-length hair.

The sheriff’s office released a sketch of the man.

It has not been determined if the suspect in those two cases is the same person.

The man has been called a person of interest and not a suspect.

The sheriff’s office is asking schools and the public to be on the lookout for suspicious activity.

Anyone with information about either of the two cases is asked to call Sheriff’s Detective Michael Arguel at (650) 363-4192 or Marguel@smcgov.org.

People can also leave an anonymous tip by calling the San Mateo County Sheriff’s Anonymous Tip Line at 1-800-547-2700.