Police try to protect peasants camping in east Paraguay . Peasants open fire , leading to 10 civilian and 7 military deaths , a police official said . The chief of the national guard 's special operations unit is among those killed , others say .
Authorities try to evict peasants camping in east Paraguay . Peasants open fire , leading to 10 civilian and 7 police deaths , a hospital official says . The chief of the national police 's special operations unit is among those killed , police say .