RIVERSIDE, Calif. -- A teenager who turned himself into police confessed to molesting some 50 children over the past several years across Southern California, authorities said.

Eighteen-year-old Joseph Hayden Boston was brought to a Riverside police station on Saturday by his mother after he allegedly told her he had sexually assaulted two boys, ages 8 and 4, at a motel, according to Riverside police spokesman Officer Ryan Railsback.

During an interview with investigators, Boston confessed to the motel assaults and also admitted molesting "upwards of 50 children" since he was 10 years old, Railsback said in a statement. The incidents happened in different cities where he had lived, including Riverside.

Boston was arrested on suspicion of two counts of oral copulation on a child under the age of 10 and jailed in lieu of $1 million bail, the statement said.

CBS Los Angeles reports that the suspect had recently been staying at the Simply Home Inn & Suites, located in the 9800 block of Magnolia Avenue in Riverside. It was there he befriended 8-year-old and 4-year-old males, who were also staying at this motel with their parents. The children were allowed to go into Boston's room at night when the molestation allegedly occurred.

"Hours later, the suspect called his own mother stating what he had just done," Railsback said in the statement.

The suspect was staying in Riverside since early November 2017, but also resided in the cities of Lakewood and Buena Park in Southern California.

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