establish contact

The officials say they have been able to establish contact with some of those trapped, and heavy lifting equipment and sniffer dogs have been brought in to assist the operation.

Noting that communication in the shut-off regime is always difficult, activists at the Transitional Justice Working Group said they had not been able to establish contact with any of the returned detainees.

Authorities managed to establish contact with the trapped men hours later and were supplying them with oxygen, dry snacks and water through a pipeline that was laid for supplying water to the tunnel for construction work.

Officials have been able to establish contact with the workers.

Officials have been able to establish contact with the trapped men and have been providing them food, water and oxygen.