SAO PAULO, Brazil – Activists trying to invade a Swiss-owned biotech seed farm clashed with guards and at least two people were shot dead, authorities and the company said Monday.

One activist opposed to the farm’s work with genetically modified seeds died and a security guard was also killed in the clash Sunday at the 304-acre farm owned by Syngenta AG (nyse: SYT – news – people ).

Syngenta spokesman Medard Schoenmaeckers said the invasion led to “a quite dramatic and violent confrontation where we understand that indeed there were some deadly injuries.”

The state government of Parana, where the farm is located, said in a statement that seven security guards were taken into custody and face accusations of homicide and gang formation…

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