Authorities have arrested 48 alleged Southern California gang members as part of an investigation of an international heroin trafficking ring.

Los Angeles County sheriff's spokesman Steve Whitmore said Tuesday arrest and search warrants were served at 38 homes and other locations.

The suspects are accused of distributing heroin trafficked from Mexico to Los Angeles, San Diego and Ventura counties.

Whitmore says the operation had been netting $2 million a month.

He says authorities have seized 15 kilograms of heroin and $100,000 in cash. Fourteen children found at raided homes were taken into protective custody.