Members and fans of an Indonesian pop band performing near the beach were swept away by an unforeseen tsunami that has so far claimed hundreds of lives along the rim of the Sunda Strait between the Java and Sumatra islands.

Seventeen‘s drummer Windu Andi Darmawan, bassist Muhammad Awal Purbani and guitarist Hernawan Sikumbang were killed in the disaster, lead singer Riefian Fajarsyah stated in a series of emotional messages posted on Instagram. The band’s manager Oki Wijaya also died, he said.

The tragedy itself was caused by the Anak Krakatau volcano which had been spewing ash and lava for months before a 64-hectare (158-acre) section of its south-west side collapsed, causing an underwater landslide that eventually created the tsunami. At least 373 people have died while at least 1,459 people were injured with more than 600 homes, 60 shops and 420 vessels being damaged when the tsunami struck.

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