Two Brazilian men have been convicted of killing an American nun who spent decades defending land rights for poor settlers in the Amazon.

A jury in the Brazilian city of Belem Saturday found the defendants guilty of murdering Sister Dorothy Stang, 73. 

The man who shot Sister Stang six times was sentenced to 27 years in prison, while his accomplice was sentenced to 17 years.

Sister Dorothy's 68-year-old brother said the sentences represent justice for his sister and the poor of the Amazon.

But observers say the real test will be if Brazil tries the ranchers who are alleged to have paid the men to kill the nun. 

Three defendants remain accused of ordering and financing the murder.

A Brazilian Senate commission has concluded the crime was part of a wider problem and urged a strong government crackdown on such extra-judicial killings.

Some information for this report provided by AP.