Los Angeles police on Saturday named a suspect in the kidnapping and sexual assault of a young Northridge girl this week as a 30-year-old transient with an extensive criminal history.

Tobias Dustin Summers, who was last released from jail on Jan. 19 after serving a brief stint for a probation violation, is the primary focus of the police investigation, LAPD Deputy Chief Kirk Albanese said at an afternoon news conference at LAPD headquarters downtown.

Summers has a criminal history dating back to 2002 that includes arrests for kidnapping, robbery, explosives possession and petty theft, Albanese said. He is not a registered sex offender.

The girl told investigators that two men were involved in the incident and that she was taken to multiple locations in different vehicles, according to law enforcement sources. She was found bruised and scratched Wednesday near a Starbucks about six miles from her home.