Around a dozen activists from the Occupy Monsanto movement, some wearing biohazard suits, arrived at the plant on Wednesday morning and chained themselves to vehicles they parked at the entrances to Oxnard's Seminis Vegetable Seeds.
The blockade prevented trucks from entering or leaving the facility for nearly six hours. Police arrested nine of the activist for trespassing, protest organizers said. The event was a preview of around sixty other events planned to take place next week in countries around the world, demonstrators said.

A police officer talks to protesters against Genetically Modified Organisms (GMO) while they are chained to a vehicle as they block a delivery entrance to a Monsanto seed distribution facility in Oxnard, California September 12, 2012.
California voters are set to vote on a ballot initiative that would require labels on most processed foods informing consumers whether the crops or animals used in making them were genetically modified. Occupy Monsanto is not affiliated with the proposal's backers.