State broadcaster VTV said 25 of the defendants are accused of murdering three policemen using grenades, firebombs and spears as the authorities advanced on Dong Tam village in the suburbs of Hanoi in January, and could face the death penalty. The police were trying to stop the villagers from blocking the building of a wall around a military airport on land they said belonged to the village.

The four others are accused of "opposing those who are on public duties," VTV said. The leader of the village, a 84-year-old man, was killed during the clash, it said. The trial is expected to last 10 days.