In a weird series of tweets on Sunday, Musksaid he would produce a video proving his submarine would have been able to reach the children and in a comment directed at Unsworth, added: "Sorry pedo guy, you really did ask for it".
Tesla's stock price was down more than 2 percent Monday in premarket trading on the news that Unsworth reportedly is mulling legal action against Musk, suggesting that investors may be growing restless with his shenanigans. Unsworth's comment prompted Musk to then fire back on Twitter. "I think people realize what sort of guy [Musk] is".
He had not had contact with Musk throughout the rescue operation nor since - a situation he hopes will not change. At the time, Unsworth hadn't yet read Musk's tweets but had been told about them.
Musk's tweets have since been deleted.
Several British elite divers flew to the region to help with the rescue at the request of Thai authorities.
Unsworth told AFP on Monday he had not reviewed the tweets in full and had only heard about them.
He later doubled down on his comments, insisting to one critic that he'd bet "a signed dollar it was true", before deleting all the tweets about Unsworth. "I don't know the guy, never met the guy, and don't want to meet the guy", he said.
Musk could find himself in hot water over his remarks.
. He's used the social network to promote his companies, spar with short sellers who are betting against Tesla shares and needle journalists who question the businesses' prospects.
Engineers from SpaceX, Musk's rocket company, has been training members of the Thai Navy to use the mini-submarine.
Theresa May bows to pressure from hardline Brexiteers
Mrs May faced a potential revolt on the Taxation (Cross-border Trade) Bill, often referred to as the Customs Bill. Barnier has warned that it will be hard to reach a conclusion in the negotiations by the October target.