The scientists work in the university's Primate Research Center. University spokesman Andy Fell says no suspicious packages had been found so far. He says such threats are unacceptable.
“It’s an attack on the ability of people to do their legitimate, lawful, carefully regulated work that benefits human and animal health. It could be a hoax, it could be a real thing so we have to take any kind of threat extremely seriously and assume that it’s real until we know that it’s not.”
A group calling itself Revolutionary Cells - the Animal Liberation Brigade posted the bomb warnings on the Internet over the weekend.
Authorities say the group used pipe bombs in 2003 against an Emeryville business that was doing work for an animal testing company. The bombs did minor damage and no one was injured. The group was also blamed for an unsuccessful attempt in 2007 to blow up a UCLA researcher's van.
The FBI considers it a terrorist organization.