Nigeria, June 6 -- The relationship between US President Donald Trump and his former ally, Elon Musk, reached a breaking point Thursday as their public feud escalated.

The tech billionaire, and erstwhile leader of the US Department of Government Efficiency (DOGE), created by Mr Trump, made a series of posts on X in response to Mr Trump's remark at the oval office on Thursday.

In one of his posts, he alleged that Mr Trump has ties to convicted sex offender and financier, Jeffrey Epstein.

"Time to drop the really big bomb: @realDonaldTrump is in the Epstein files. That is the real reason they have not been made public," Mr Musk wrote on X, his social media platform.

Minutes later, he followed up with, "Mark this post for the future. The...