Rescue teams in eastern Indonesia recovered four additional bodies on Sunday after a magnitude-7.7 earthquake struck Flores the previous day, raising the death toll to 51. More than 100 people were injured, while thousands were forced to leave their homes.

The earthquake struck the Flores region at a depth of about 10 kilometers early Saturday morning, according to the U.S. Geological Survey. Residents fled as tsunami warnings were issued and later canceled. Indonesia’s meteorological agency reported at least 235 aftershocks.

Rescuers continued searching through collapsed structures and landslides across six regencies on Flores. Efforts were concentrated in Manggarai, East Manggarai and Nagekeo, where damaged roads and communication problems had made access difficult.

Authorities said more than 900 houses were destroyed and another 450 were damaged, forcing around 5,000 residents into temporary shelters. Landslides also blocked parts of the Trans-Flores Highway, a major road connecting communities across the mountainous island.

Relief teams have been supplying food, drinking water, blankets and medicine while emergency shelters are being established. Restoring electricity and communications and reaching isolated villages remain major challenges.

Residents in Labuan Bajo, a popular tourist gateway to Komodo National Park, spent the night outside because they feared further tremors. Many described the earthquake as extremely frightening.

Indonesia frequently experiences earthquakes and volcanic eruptions because it lies along the Pacific Ring of Fire. Flores has suffered major disasters before, including a 1992 earthquake and tsunami that killed about 2,500 people. Other devastating earthquakes and tsunamis struck Sulawesi in 2018 and off Sumatra in 2004, causing thousands of deaths.