Thailand cave rescue: Four boys saved and undergoing physical examination

Journalists film an ambulance believed to be carrying rescued schoolboys as it travels to a military helipad near Tham Luang cave complex in the northern province of Chiang Rai, Thailand, July 8, 2018.

Ambulances are seen outside the Tham Luang cave complex after Thailand's government instructed members of the media to move out urgently, in the northern province of Chiang Rai,Thailand, July 8, 2018.

Rescue workers are seen near the Tham Luang cave complex, where 12 schoolboys and their soccer coach are trapped inside a flooded cave, in the northern province of Chiang Rai, Thailand, July 8, 2018.

Divers arrive the Tham Luang cave complex, where 12 schoolboys and their soccer coach are trapped inside a flooded cave, in the northern province of Chiang Rai, Thailand, July 8, 2018.

Soldiers arrive outside the Tham Luang cave complex, where 12 schoolboys and their soccer coach are trapped inside a flooded cave, in the northern province of Chiang Rai, Thailand, July 8, 2018.

A military helicopter believed to be carrying rescued schoolboys takes off near Tham Luang cave complex in the northern province of Chiang Rai, Thailand, July 8, 2018.

An ambulance believed to be carrying rescued schoolboys travels to a military helipad near Tham Luang cave complex in the northern province of Chiang Rai, Thailand, July 8, 2018.

Rescue workers arrive at the Tham Luang cave complex, where 12 schoolboys and their soccer coach are trapped inside a flooded cave, after Thailand's government instructed members of the media to move out urgently, in the northern province of Chiang Rai, Thailand, July 8, 2018.

A police officer and soldier stand guard in front of Tham Luang cave complex, where 12 schoolboys and their soccer coach are trapped inside a flooded cave, after Thailand's government instructed members of the media to move out urgently, in the northern province of Chiang Rai, Thailand, July 8, 2018.

Ambulance is seen outside the Tham Luang cave complex after Thailand's government instructed members of the media to move out urgently, in the northern province of Chiang Rai, Thailand, July 8, 2018.