A massive tsunami has hit the island nation Indonesia. It is believed to have been triggered by an underwater landslide caused by a volcanic eruption. The Associated Press reports:

An eruption of one of the world’s most infamous volcanic islands is believed to have triggered a tsunami that killed at least 222 people in Indonesia during a busy holiday weekend. The waves smashed onto beaches at night without warning, ripping houses and hotels from their foundations in seconds and sweeping terrified concertgoers into the sea.

More than 800 people were injured and dozens more missing after the tsunami hit around the Sunda Strait at 9:27 p.m. Saturday, the Disaster Management Agency said. The toll could continue to rise because some areas had not yet been reached.

Reuters adds:

Coastal residents reported not seeing or feeling any warning signs, such as receding water or an earthquake, before waves of 2-3 metres (6-10 feet) washed ashore, according to media.

Authorities said a warning siren went off in some areas.

The timing of the tsunami, over the Christmas holiday season, evoked memories of the Indian Ocean tsunami triggered by an earthquake on Dec. 26 in 2004, which killed 226,000 people in 14 countries, including more than 120,000 in Indonesia.