Updated 2:50 p.m.

A man suspected of sexually assaulting a 9-year-old girl in unincorporated Clackamas County earlier this year was arrested Wednesday at the border between the U.S. and Mexico, deputies said.

Santiago Martinez-Flores

U.S. Customs and Border Protection officials detained Santiago Martinez-Flores about 15 miles from San Diego, according to the Clackamas County Sheriff's Office. The Oregon agency announced two days prior that detectives had used physical evidence to connect Martinez-Flores, now 48, to the February assault.

Deputies previously said Martinez-Flores, who has a lengthy criminal record, had been deported to Mexico in 2001 after serving about two years in Oregon prison. He's now being held in the San Diego County Jail, deputies said.

Deputies previously said the sexual assault suspect, since identified as Martinez-Flores, broke into a Clackamas Trails Apartments unit in the early morning of Feb. 26 and that the girl awoke while he was assaulting her. She later gave a description of the suspect, deputies said, and a forensic artist produced a sketch of him.

A Clackamas County detective is headed to California to interview Martinez-Flores, deputies said, and authorities are working to extradite Martinez-Flores to Clackamas County.

-- Jim Ryan

jryan@oregonian.com

503-221-8005; @Jimryan015

Update includes additional information from the Clackamas County Sheriff's Office