SANTA CRUZ -- FBI agents said Thursday that a 35-year-old San Francisco Bay Area man accused of three animal-rights motivated bombings in 2003 may have ties to Santa Cruz.

Daniel Andreas San Diego, originally from Berkeley, has been spotted in Santa Cruz as well as Novato and San Rafael, said FBI spokesman Peter Lee. San Diego is suspected of bombing Chiron Corp., an Emeryville biotechnology firm, and twice bombing Shaklee Corp., a Pleasanton nutrition and cosmetics company, authorities said.

The explosions -- which included packs of nails -- caused minor damage and no injuries.

Daniel Andreas San Diego, the fugitive wanted in connection with the Chrion and Shaklee bombings in Emeryville and Pleasanton.
Daniel Andreas San Diego, the fugitive wanted in connection with the Chrion and Shaklee bombings in Emeryville and Pleasanton.

San Diego, who is on the FBI's Most Wanted Terrorist list, has ties to animal rights extremist groups, according to the FBI. His alleged actions have been an example to others, authorities have said -- including a 2009 firebombing at a UC Santa Cruz scientist's home and a separate bombing of a UCSC scientist's car.

"The FBI is offering a reward of up to $250,000 for information leading directly to the arrest and prosecution of San Diego," Lee said. "The reward can be paid confidentially."

San Diego has carried a handgun in the past and is considered armed and dangerous, the FBI said.

"We strongly encourage the public to submit tips to law enforcement if they believe they have information about fugitive San Diego's whereabouts. No tip is too small," Lee said. "San Diego has bomb-making knowledge, which makes him a serious threat to any community. Not only can he fine-tune this ability, but he may also be able to impart this dangerous knowledge onto others."

He is a white man described in 2003 as 6 feet tall and 160 pounds. He has brown hair and brown eyes, as well as a round tattoo in the center of his chest with burning hillsides and the words "It only takes a spark."

He also has tattoos that include burning and collapsed buildings, but FBI agents said they may have been altered with new tattoos.

San Diego has worked for cash as a computer network specialist and has avoided using banks, checks and credit cards, according to the FBI. He also has an interest in sailing and has followed a vegan diet.

Tips have led authorities to believe he has ties to Germany, Spain, France, Italy, Costa Rica and Bolivia.

"He may not be fluent in a foreign language," Lee said, and he may be teaching or working in tourism.

Because San Diego has been in hiding, he may be "vague or contradictory about his past history, routinely using prepaid cell phones or calling cards or often changing his email address," said Lee.

The FBI asks anyone with information to call its confidential tipline at 415-553-7400 or submit tips online at http://tips.fbi.gov.

Staff writer Kristin J. Bender contributed to this report.