Rescuers tried to reach seven villagers trapped inside a flooded cave in Laos for the seventh day on Tuesday, with difficult terrain and weather impeding their efforts. There has been no contact with them since they became trapped.

The villagers entered the cave in Xaisomboun province on May 19, but heavy rain triggered flash flooding that blocked their exit, according to Lao and Thai rescue teams involved in the operation.

The Lao organisation Rescue Volunteer for People, which is working closely with the local authorities, posted on its Facebook page that Tuesday’s operation plan included exploring air shafts above the cave in hopes of identifying possible access points and locating the trapped people.

Rescue workers from neighbouring Thailand arrived at the site over the weekend to assist the operation. Those helping out include divers from several nations who took part in the complicated 2018 rescue in northern Thailand of 12 schoolboys and their soccer coach who were trapped for more than two weeks in a cave before being safely extricated.

According to rescuers, divers have navigated about 100m into the flooded, narrow cave. They believe the villagers may be trapped about 30m beyond the furthest point currently accessible and are also working to pump water out of the cave to aid the rescue operation.