Billionaire entrepreneur Elon Musk tweeted that a team from his rocket company SpaceX in Los Angeles is building a mini-sub to help with the rescue.

"Got more great feedback from Thailand. Primary path is basically a tiny, kid-size submarine ... Light enough to be carried by 2 divers, small enough to get through narrow gaps. Extremely robust," Musk tweeted, adding that it would take eight hours to construct and 17 hours to transport to Thailand.

The Thai defense ministry said a team from a Musk firm with drilling and exploration know-how should reach the cave on Sunday.

and they don't want cameras or bystanders watching if it doesn't end well.

A vehicle slid off a path, critically injuring some people.

Im worried and can't stop thinking about these kids.

My heart goes out to all involved, including the families anxiously waiting for the rescue.

I'm sure they're taking every precaution to make sure the whole group is safely rescued.

It's heartbreaking and I cannot imagine what they are all going through.

What a tense, frightening situation. I hope they all get out soon.

The governor said the earliest the boys will come out is 9pm tonight, due to the long journey from where they are located and the entrance and they cannot guarantee the mission will be completed today, because the boys will all come out gradually.