Is Brazil's Guarani-Kaiowa tribe being wiped out?

Indigenous leaders in Brazil have accused the government of pursuing a "deliberate policy of genocide", after a Guarani Indian leader was killed in the west of the country.

The man was shot dead as hundreds of indigenous families invaded farmland, which they say is legally theirs.

Landowners deny murder, but both sides blame the government for standing by and doing nothing.

The BBC's Wyre Davies reports from Matto Grosso do Sul.