Giant boulders float down rivers of lava from La Palma volcano eruption

Drone footage shows lava flows carrying huge boulders from the Cumbre Vieja volcano in La Palma. The advancing rivers of molten rock prompted a lockdown on Monday, as houses in their path were destroyed. More than 1,000 homes have been destroyed since the eruption began on 19 September, and 6,000 people have been evacuated from the area