Aerial visuals of Anak Krakatau volcano eruption that caused Indonesia tsunami

A large chunk of a flank of the volcanic Anak Krakatau island slipped into the ocean and triggered a tsunami that hit Indonesian shores, killing hundreds of people, officials and scientists said on Monday.

At least 281 people were killed, hundreds injured and many buildings were heavily damaged when the tsunami struck, almost without warning, along the rim of the Sunda Strait, between Java and Sumatra islands, late on Saturday.

Anak Krakatau had been spewing ash and lava for months before a 64-hectare (0.64 square km) section of the southwest side of the volcano collapsed, an Indonesian official said.