San Diego police have charged a Navy engineer from Alexandria with three counts of child molesting in connection with an investigation of child pornography in four states, police in California said.

Alexandria police, acting on a tip from Los Angeles police, searched last week the Old Town apartment of Ron Woodward, who is jailed in California on the charges. The officers found boxes of photographs of nude children, 14 reels of film, five rolls of undeveloped film and a 35mm camera and two movie projectors, according to court records. "At this point we are only assisting" California officers, Alexandria police investigator Ray Snuffer said.

According to the court papers, Woodward was sent by the Navy to the Los Angeles area for a two-week stay in late July. While there, Woodward supposedly went places there to engage in sexual activity with children and to trade photographs of children with others, a Los Angeles police detective said in court papers.

Woodward, who is being held under $50,000 bond, allegedly gave his California address and telephone number to an undercover officer and extended an invitation for him to call. He was arrested in San Diego Thursday.

The investigation began in Seattle and has involved police in New Mexico and California as well as Virginia.