Elon Musk really wants the world to know he's at the cave rescue operation site in Thailand, and he's there to help.
The billionaire Tesla chief has visited the Tham Luang cave to drop off a miniature submarine he hoped might help with the ongoing rescue operation of the Wild Boar soccer team.
On the weekend Mr Musk said he had been building a "tiny, kid-size submarine" with "feedback from Thailand".
Twelve members of the team and their coach became trapped on June 23, although rescuers managed to free the first eight boys on Sunday and Monday.
It is unclear whether Mr Musk's submarine will be necessary, but he said he would leave it at the cave "in case it may be useful in future".
In a tweet today Mr Musk said he had "just returned from Cave 3. Mini-sub is ready if needed."
"It is made of rocket parts & named Wild Boar after kids' soccer team."
He added: "Thailand is so beautiful."
Four boys and the coach are still to be rescued.
When spruiking his submarine yesterday, Mr Musk said the design had four "handles/hitch points" on both the front and back of the device, adding: "Two air tank connections on front and two on rear, allowing one to four tanks simultaneously connected, all recessed for impact protection [with] secondary cap seal if leak develops."
It also has "segmented compartments to place rocks or dive weights [and] adjust buoyancy".