In the same tweet, Musk also responded to Unsworth's claim that the Tesla CEO was asked to leave the cave and his help was not appreciated by officials leading the rescue mission. Among other things, Unsworth said Musk's submarine had "absolutely no chance of working". Secondly, nearly everyone is in agreement that he went way overboard with the remark accusing Unsworth of being a pedophile just because he doesn't like what the man said, as can be seen in the replies to his tweet.
Mr Unsworth has spent the best part of six years exploring the caves, and his intimate knowledge proved vital in the rescue effort. Later on Sunday, Musk deleted the "pedo" tweet and its follow-up.
His extraordinary "pedo" comment is the latest episode of questionable behaviour that has fuelled a wave of critical media coverage and concerns that the Tesla and SpaceX chief executive officer may be unravelling.
Unsworth could not immediately be reached.
This is a developing story.
Calling Unsworth "sus" - or, suspicious - was just the tip of the iceberg.
Jason Mallinson said, "I've never done anything as risky as that and I don't think I ever will again, but it was the only option we had and we took it". "We will make one of the mini-sub/pod going all the way to Cave 5 no problemo".
Obama Meets with President Kenyatta on Arrival in Kenya
Obama, according to local media, headed straight to State House, where he was slated for a meeting with President Uhuru Kenyatta . He was born in Hawaii, where he spent most of his childhood raised by his mother, a white American from Kansas.
Musk has been the subject of much ridicule online since his attempt at helping the Thai rescue mission.
Depending on who you ask, Musk was either just a huge attention seeker or a billionaire rocket inventor just trying to do his bit. "The submarine, I believe, was about 5ft 6in long, rigid, so it wouldn't have gone round corners or any obstacles".
Believing the sub he built would have been able to get the trapped children out of the cage, Musk wrote, "I challenge this dude to show final rescue video". This time, he ended up attacking Vernon Unsworth, one of the Thai cave rescue divers who played an important role in the mission. "It wouldn't have made it the first 50 meters".
Writing for The Australian last week, journalist Caroline Overington had a simple message for Musk after he turned up uninvited to the Thai rescue site.
In an editorial in The New York Times, Zeynep Tufekci writes, "Mr. Musk's desire to help was commendable". And while Musk's fans lauded his intentions, his submarine drive-by also became the butt of many jokes.
Huffington Post senior reporter Ashley Feinberg, meanwhile, wondered if Musk would ever acknowledge his silently deleted tweets.