An animal rights activist wanted in the 2003 bombings at two corporate offices in northern California might be in western Massachusetts, the FBI said Wednesday.
The FBI said it had a tip from the television show "America's Most Wanted" that 33-year-old Daniel Andreas San Diego may be in the Northampton area.
San Diego is one of 31 people on the agency's Most Wanted Terrorists list, and there is a $250,000 reward for information leading to his arrest.
The agents said they are seeking the public's help at the request of the FBI in San Francisco.
The computer specialist from Berkeley, Calif., is accused in bombings at biotechnology firm Chiron Corp. in Emeryville, and nutrition and cosmetics company Shaklee Corp. in Pleasanton. No one was injured.
Two pipe bomb explosions struck an hour apart at Chiron on Aug. 28, 2003. A bomb strapped with nails exploded at Shaklee on Sept. 26, 2003. The blasts caused only minor damage, including some shattered windows.
A group calling itself "Revolutionary Cells" took responsibility, saying the companies were targeted for their ties to a research company that experimented on animals.
Richard DesLauriers, a special agent in charge of the Boston FBI office, said Wednesday that the recent tip to "America's Most Wanted" was "credible and viable," but he declined to discuss details. He said agents are pursuing it aggressively as they investigate San Diego's whereabouts.
"He could possibly be out here in the western Massachusetts area and we're seeking the western Massachusetts public's assistance," DesLauriers said.
In 2009, San Diego became the first domestic terror suspect named to Most Wanted Terrorists list. He's currently the only person on the list without an Arabic name.
The search for him has spanned the globe. FBI officials have said they've talked with authorities in Germany, the United Kingdom, Costa Rica, France, Spain, Denmark, Austria, Italy, the Czech Republic, Mexico, Argentina, the Philippines and Chile. Two years ago, the FBI said he may be living in Costa Rica.
In 2005, reports circulated that San Diego had been seen in southwest Virginia, but authorities said there no evidence that he had been there.
San Diego has ties to animal rights extremist groups and is a vegan who doesn't eat food containing animal products, according to the FBI.
He also has unusual tattoos, the FBI says, including a round image of burning hillsides on his chest with the words "It only takes a spark" written below, and images of burning and collapsing buildings on the sides of his abdomen and back.
He has worked as a computer network specialist and with the Linux operating system, and is skilled at sailing, the FBI says. He's also known to carry a handgun, officials said.