A 24-member Seal team led by Rear Admiral Arpakorn Yukongkaew, commander of Navy Seal, was flown to Chiang Rai to reinforce Seal teams already at Tham Luang- Khun Nam Nang Non in Mae Sai district.
The new Seal team comprises frog men, medics and communication personnel.
Meanwhile, Army Commander-in-Chief General Chalermchai Sitthisart ordered the Army Aviation Centre in Lop Buri to keep a helicopter and a special force team on the standby to be flown to Chiang Rai to provide support to the search and rescue operations.
The Army said that the Third Army Region’s public disaster mitigation centre has already dispatched 14 search teams numbering 120 men to the cave.
Search for the 13 missing continued for the third consecutive day on Tuesday with search in the cave undertaken mainly by Seal teams and foot patrol on mountain top to search for cracks or tunnels which will hopefully lead to the underground cave.
Meanwhile, water pumps which were brought into the cave started pumping water out of the cave after electricity was made available through a one kilometer long electrical cable attached to a generator.
An official said that diesel-fuelled water pumps could not be used because fuel emissions would add more carbon dioxide in the cave.
In the meantime, relatives and families of the 13 missing kept vigil in front of the cave, praying and waiting anxiously for the safety of their loved ones. Some of them held religious rituals to seek spiritual help for their children.
So far, search teams have not located the 13 missing.