SANTA CRUZ, Calif. (AP) — The FBI is investigating two bombings that targeted university scientists, the latest in a rash of attacks against biomedical researchers who experiment on animals, authorities say.

Both scientists work at the University of California, Santa Cruz. One of them and his family were forced to escape from a second-story window early Saturday when a firebomb was lit on the home's porch, Santa Cruz police said. An adult was treated at a hospital and released.

Police Capt. Steve Clark called the bombing "an attempted homicide."

Also that morning, a firebomb destroyed a car belonging to another researcher. Clark said authorities were treating the attacks as "domestic terrorism."