LAPD Looking Into Mel Gibson's Ex-Girlfriend

NEW YORK (CBS) Mel Gibson isn't the only one facing possible criminal charges.

Los Angeles authorities are checking into extortion allegations against Gibson's ex-girlfriend, Russian singer Oksana Grigorieva.

Sheriff's spokesman Steve Whitmore says the agency is looking into whether Grigorieva may have tried to extort the Academy Award-winner. He declined to offer any other details on the inquiry.

Detectives earlier this month interviewed Grigorieva after she claimed Gibson abused her during an incident in January.

A spokesman for Grigorieva declined comment Wednesday.

Gibson and Grigorieva are locked in a bitter custody dispute over their infant daughter.

No arrests have been made, and neither has been charged with any crimes.