Los Angeles police may investigate an alleged sexual tryst between pop singer Justin Bieber and a 20-year-old woman Mariah Yeater because it violates the statutory rape law of California.

Mariah Yeater filed a paternity suit last week against Bieber, claiming that her baby boy is Bieber's son. In 2010, Yeater said she and Bieber, then 16, had a sexual encounter after one of his concerts at the Staple Center in LA. The California woman claims that they just met once but their alleged liaison led to her pregnancy.

Police commander Andrew Smith said on Thursday that police could look into the lawsuit although no report has been taken out about the October 2010 incident.

Various media outlets have reported Yeater's suit against Bieber. However, Bieber's camp denies that he is the father of her three-month-old baby boy.

According to the California law, anyone who has unlawful sex with a minor and not more than three years older is guilty of a misdemeanor, which carries up to a one-year jail sentence.

This week the Justin Bieber baby daddy rumor set the Web ablaze. As thousands of news articles about the allegations surged, Bieber's fans discussed the incident furiously online.

The pop singer's fans were fast to defend their beloved 17-year-old star. On Facebook there have formed groups such as Mariah Yeater Stay Away from Bieber created by the impassioned Beiberers. They also voice their anger to Yeater and support for Bieber on Twitter.

Meanwhile, comedian Jimmy Fallon spoofed the pop star's ballad Baby on Late Night with Jimmy Fallon Wednesday night. Modified as (It's Not My) Baby. It was going viral on the web Thursday.

You said we did it and I'm a dad, My lawyer's tripping 'cause this looks bad. You only said this to get my cash and now Selena Gomez is gonna kick my ass. It's not my baby, baby, baby, no ... I'm telling you it's not mine.

However, Bieber's camp is not taking the paternity claim lightly, While we haven't yet seen the lawsuit, it's sad that someone would fabricate malicious, defamatory and demonstrably false claims, Bieber's rep said in a statement. We will vigorously pursue all available legal remedies to defend and protect Justin against these allegations.