The death toll from an Indonesian tsunami has risen past 280 with more than 1,000 people injured.

The tsunami struck Sunda Strait coastal areas along western Java and southern Sumatra islands without warning in the darkness Saturday night, according to the Associated Press.

Disaster agency spokesman Sutopo Purwo Nugroho said the latest tolls Monday morning were 281 dead and 1,016 injured. The tally of missing is 57 but the numbers are expected to rise.

The waves that swept terrified people into the sea followed an eruption and possible landslide on Anak Krakatau, one of the world’s most infamous volcanic islands.