SANTA ANA, Calif. (KABC) — A 30-year-old man who worked as a nanny across Southern California is accused of molesting two young boys who were under his care, officials announced Wednesday.

Matthew Antonio Zakrzewski, of Costa Mesa, pleaded not guilty to three felony counts of lewd and lascivious acts with a minor under the age of 14 and one felony count of oral copulation of a child under the age of 10. He was also charged with one felony count of possession of child pornography.

He was arrested on May 17 by Laguna Beach police at a local airport after deplaning an international flight, according to the Orange County District Attorney's office.

Investigators say a Laguna Beach couple told city police that their babysitter, Zakrzewski, touched their 8-year-old son inappropriately and was concerned for the safety of their child and others.

Zakrzewski was hired by the couple through one of his several babysitting websites, officials say.

An investigation led to the identification of another victim, a 7-year-old boy, in Los Angeles.

Zakrzewski is being held at the Orange County Jail on $1 million bail and is scheduled to appear in court May 31.

Laguna Beach police are asking for the public's help in locating any other potential victims. Anyone with information related to this case or any other incidents involving Zakrzewski is urged to call the Investigations Division line at 949-715-1300.

This story was written by KABC.