Via the Mercury News:
Protesters were arrested on suspicion of assault on a police officer, resisting arrest and possession of explosives. Police said one person had a device that was the equivalent of a quarter stick of dynamite -- not an M-80 firecracker, Watson said, but a 6-inch-long explosive.h/t Verum Serum
"I'd never seen anything like it before," she said. "That's not something that'll blow your thumb off; that's something that could easily kill you or take a body part off."