A tsunami that hit Pandeglang, Serang and South Lampung, Indonesia, Saturday night, killed at least 62 people and injured at least 548, Sutopo Purwo Nugroho, head of public relations at Indonesia's National Disaster Mitigation Agency, said on television.

Two people are missing, he said earlier.

Nugroho tweeted on his verified account that 430 houses and nine hotels were heavily damaged, indicating the tsunami hit residential and tourist areas.

"We are still gathering information," Nugroho said. "The worst hit area is Pandeglang district, along the coastal area, including residential and tourist areas in the Tanjung Lesung beach, Lesung beach, Teluk Lada, Panimbang and Carita beach."

The tsunami was likely caused by a combination of underwater landslides due to a volcanic eruption, the country's meteorological, climatological and geological agency said.

"The Geological Agency detected at 21.03 local time the Anak Krakatau erupted," Indonesia's Meteorology, Climatology, and Geophysical Agency said, adding that the tsunami struck 24 minutes later. "It's possible the materials around Anak Krakatau collapsed to the sea and triggered the tsunami and affected beaches around Sunda Strait."

Some residents fled to shelters after the tsunami hit.

Kathy Mueller, a spokesperson for the International Federation of Red Cross and Red Crescent Societies in Indonesia, told CNN that the organization expects the death toll to rise.

"It's so early after the disaster, the numbers will fluctuate and it will take a while before the picture becomes clearer... It's a very fluid situation and the numbers are going to change," Mueller said by phone.

She added that because of the holiday season, "the area of Pandeglang would have been crowded with local tourists when the waves came in."

Red Cross teams are bringing in basic household items, clean water and equipment to help clear away debris, Mueller said.

Indonesia has been hit by a series of natural disasters in recent weeks, including a powerful earthquake that hit the island of Sulawesi on September 28. (CNN)