Navy SEAL divers have brought four more people out of the Tham Luang cave system in northern Thailand.

It brings the number up to eight who've been rescued over the past two days.

CBS News originally reported that the coach was among the four who got out today.

But in its latest update, the U.S. network says that it was four boys who were pulled out alive.

They were all taken to hospital.

There are still four more boys inside the cave along with the coach.

The most recent media images showed them on a ledge four kilometres from the entrance.

The boys soccer team and their coach became stuck there 16 days ago when rising water levels made it impossible for them to leave. 

Officials have been trying to flush water out of the cave as the rainy season has begun in Thailand.

One of the biggest concerns is diminishing oxygen levels.