MEDAN, Indonesia (AP) — Some residents of the flood-hit island of Sumatra resorted to looting, seeking food and water to survive, authorities said Sunday.

Improved weather on Saturday helped rescuers on Indonesia's Sumatra island recover more bodies as they struggled to reach several areas that were hit by landslides and flash floods that left more than 300 dead and scores missing.

Videos on social media showed people scrambling past crumbling barricades, flooded roads and broken glass to get their hands on food, medicine and gas.

A powerful earthquake of 6.6 magnitude struck off the Indonesian island of Sumatra on Thursday , the U.S. Geological Survey (USGS) said. The Indonesia Tsunami Warning Center said there was no potential for a tsunami. The quake struck at a depth of 16 miles, the USGS said. There were no immediate reports of casualties or damage.

More than 300 people on Indonesia's western island of Sumatra have died in torrential rain and rain-triggered disasters.