The Twitter comment came amid a spat between Mr Musk and Vern Unsworth, a diver who had claimed the Tesla founder's offers to help save the children were a "PR stunt".
The tech entrepreneur offered advice on Twitter for rescuing the Thai football team trapped in a flooded cave with their coach
SpaceX launched a new Falcon 9 rocket and a refurbished one, and both first stages of the rockets landed on drone ships in the ocean
SpaceX was supposed to launch the Falcon 9 which would carry the EchoStar 23 satellite into geostationary-transfer orbit
The SpaceX chief executive Elon Musk has revealed plans to develop a new spacecraft in order to take people to Mars, and hopefully one day other planets too
Company building hyperloop has rolled out its own version of vibranium to protect its capsules - claiming the technology is 10 times stronger than steel