A powerful magnitude 7.7 earthquake struck off the coast of Indonesia early Saturday, collapsing buildings and homes, killing at least five people and causing panic in a region prone to deadly quakes. Authorities issued a tsunami warning and urged coastal residents to move to higher ground, but later lifted the warning when Indonesia’s Meteorology, Climatology and Geophysics Agency said monitoring showed no significant sea-level changes that would pose a threat to coastal communities. The US Geological Survey said the quake hit Indonesia's Flores region with a depth of 10 kilometers at 5:58 a.m. local time. Its epicenter was 68 km (42 miles) north-northwest of the city of Ende in East Nusa Tenggara province. The initial quake was followed by several aftershocks. East Nusa Tenggara police chief Rudi Darmoko said preliminary reports indicate two fatalities in Sikka Regency and three in Manggarai Regency as the earthquake caused severe damage and collapsed buildings. He said power outages in cities and villages have hampered the flow of information and complicated search and rescue efforts. “We are continuing to collect reports of damages and casualties, but there are communication disruptions,” The Associated Press quoted Darmoko as saying. Footage on local television showed patients at several hospitals being evacuated from buildings as a precaution following the quake. Hospital staff moved equipment outdoors, including beds, IV stands and oxygen cylinders, and set up temporary treatment areas to adapt to emergency conditions. Rescuers inspect a heavily-damaged building at L. Say port following an earthquake in Sikka, Maumere, East Nusa Tenggara province, Indonesia, August 15, 2026. Indonesian Search and Rescue Agency (Basarnas)/ Handout via REUTERS The quake was felt across much of Flores island with initial reports indicating heavy damage. Yohanna Embu, a resident of Sikka regency, said a number of buildings were damaged by the strong shaking and panicked people ran to higher ground. “Many buildings here were damaged ... I saw that the waiting room at the port terminal in Maumere had collapsed,” she said. The quake also reportedly caused panic in Bima, a city in neighboring West Nusa Tenggara province. There were also damages reported in some part of southern Sulawesi island. Indonesian authorities initially issued a tsunami warning for parts of East Nusa Tenggara, West Nusa Tenggara, South Sulawesi and Southeast Sulawesi provinces, and urged residents to stay away from beaches and riverbanks. The agency located the shallow undersea quake near Flores island. Indonesia prone to earthquakes Indonesia, a vast archipelago of more than 17,000 islands, is prone to earthquakes and volcanic activity because of its location on the “Ring of Fire,” an arc of volcanoes and fault lines in the Pacific Basin.