TANJUNG LESUNG, Indonesia — Doctors worked to help survivors and hundreds of people searched on debris-strewn beaches for more victims Monday from a deadly tsunami that smashed into houses, hotels and other buildings without warning in the darkness along an Indonesian strait.

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

At least 222 people were killed, more than 800 were injured, and dozens have been reported missing from the disaster areas along the coastlines of western Java and southern Sumatra islands. The death toll could increase once authorities hear from all stricken areas.

The Indonesian Medical Association says it is sending more doctors and medical equipment and that many of the injured are in need of orthopedic and neurosurgery expertise. It says most patients are domestic tourists who were visiting the beach during the long holiday weekend.

It was the second deadly tsunami to hit Indonesia this year, but the one that struck the island of Sulawesi on Sept. 28 was accompanied by a powerful earthquake that gave residents a brief warning before the waves struck.

On Saturday night, the ground did not shake beforehand to alert people to the oncoming wave that ripped buildings from their foundations in seconds and swept terrified concertgoers on a resort beach into the sea.

Dramatic video posted on social media showed the Indonesian pop band Seventeen performing under a tent on Tanjung Lesung beach at a concert for employees of a state-owned electricity company. Dozens of people sat at tables while others swayed to the music near the stage as strobe lights flashed and theatrical smoke was released. A child could also be seen wandering through the crowd.

Seconds later, with the drummer pounding just as the next song was about to begin, the stage suddenly heaved forward and buckled under the force of the water, tossing the band and its equipment into the audience.

The group released a statement saying their bass player, guitarist and road manager were killed, while two other band members and the wife of one of the performers were missing.