Brazil's government has sent 2,000 troops to an Amazon rain forest region following the deaths of an American nun and an advocate of landless peasants in the past four days.

The soldiers headed Wednesday to the state of Para, one day after thousands of mourners buried Sister Dorothy Stang.  The environmental activist was killed Saturday after campaigning for decades for the rights of landless peasants. 

The 74-year-old Catholic missionary was fatally shot near the town of Anapu, days after telling Brazilian human rights officials that she and several local farmers faced death threats. 

As Brazilians mourned Sister Dorothy, the leader of a peasant workers union, Daniel Soares da Costa, was gunned down in Para. 

Sister Dorothy's death has drawn attention to Anapu, which is notorious for illegal logging and violent conflicts over land.

Some information for this report provided by AP and Reuters.