Pakistan, June 12 -- Elon Musk, the world's richest person and Donald Trump's former advisor, said Wednesday he regretted some of his recent criticisms of the US president, after the pair's public falling-out last week.

"I regret some of my posts about President @realDonaldTrump last week. They went too far," Musk wrote on his social media platform X.

Musk's expression of regret came just days after Trump threatened the tech billionaire with "serious consequences" if he sought to punish Republicans who vote for a controversial spending bill.

Their blistering break-up - largely carried out on social media before a riveted public since Thursday last week - was ignited by Musk's harsh criticism of Trump's so-called "big, beautiful" spendi...