Chile's imposing southern Llaima volcano roared into action on Friday, spewing rocks, lava and clouds of ash and putting six nearby communities on a red alert, the National Emergency office says.
The 3,125-metre volcano 700km south of Santiago erupted early in the morning, after six months of quiet following its initial eruption on 1 January.
Six communities in the vicinity have been placed on red alert, pending immediate evacuation should the situation worsen.
Llaima is Chile's second erupting volcano this year. In May, the 1,000-metre Chaiten volcano, 100km further south, awoke after centuries of lying dormant.