A tsunami apparently caused by the eruption of an island volcano killed more than 160 people around Indonesia's Sunda Strait during a busy holiday weekend, sending a wall of water crashing ashore and sweeping away people attending a beach concert along with hundreds of houses including hotels, the government and witnesses said.
More than 700 people have been reported injured since the tsunami hit at 9:27 p.m. Saturday, the Disaster Management Agency said.
At least 30 others are unaccounted for.
The disaster could have been caused by undersea landslides from the eruption of Anak Krakatau, a volcanic island formed over years from the nearby Krakatau volcano, scientists from Indonesia's Meteorology and Geophysics Agency said.
They also cited tidal waves caused by the full moon.
Footage posted on social media showed a pop band named "Seventeen" performing for employees from a local electric company under a tent on a beach as dozens of people sat listening at tables covered in white cloths.
As bright strobe lights flashed on stage, a child could be seen wandering through the crowd.
Then, as the second song was about to begin with the drummer pounding, the stage suddenly heaved forward, throwing the band and all their equipment into the audience.
The band released a statement saying their bass player and road manager were found dead, while three other band members and the wife of one of the performers remained missing.
"The tide rose to the surface and dragged all the people on site," it said.
"Unfortunately, when the current receded our members are unable to save themselves while some did not find a place to hold on."
Tourists were also affected during the long holiday weekend ahead of Christmas.
Australia and New Zealand said they have no information their citizens were among the victims but were continuing to check.
"I had to run, as the wave passed the beach and landed 15-20m (meters) inland," Norwegian Øystein Lund Andersen wrote on Facebook.
The self-described photographer and volcano-enthusiast said he was taking pictures of the volcano when he suddenly saw a big wave come toward him.
"Next wave entered the hotel area where I was staying and downed cars on the road behind it. I managed to evacuate with my family to higher ground through forest paths and villages, where we are taken care of (by) the locals.
We are unharmed, thankfully."
The worst affected area was the Pandeglang region of Banten province in Java, which encompasses the Ujung Kulon National Park and popular beaches, the disaster agency said.
Disaster agency spokesman Sutopo Purwo Nugroho said 168 deaths have been confirmed so far and another 30 people are missing.
Also, 745 were injured.
He said those numbers may still rise since not all affected areas have been reached.
Indonesian President Joko "Jokowi" Widodo expressed his sympathy and ordered government agencies to respond quickly to the disaster.
Gegar Prasetya, the co-founder of the Tsunami Research Center Indonesia, said the waves were likely caused by a flank collapse - when a big section of a volcano's slope gives way.
He said it's possible for an eruption to trigger a landslide above ground or beneath the ocean, both capable of producing a tsunami.
"Actually, the tsunami was not really big, only one meter," said Prasetya, who has closely studied Krakatau. "The problem is people always tend to build everything close to the shoreline."
Physical losses included 430 heavily damaged homes, nine heavily damaged hotels and 10 heavily damaged vessels.
Footage posted by the head of the disaster agency showed the aftermath of flooded streets and an overturned car.
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