Billionaire MacKenzie Scott, ex-wife of Amazon founder Jeff Bezos, has donated another $2.7bn to a range of charities, the BBC reports.

Scott said in a blog post that she wanted to give the money to those "that have been historically underfunded and overlooked".

She wrote that she had chosen 286 organizations working on racial inequality, the arts and education. Scott is one of the world's richest women.

Much of her fortune comes from her 2019 divorce from Bezos, who is currently the world's richest man. As part of the deal, Scott ended up with 4% of Amazon's shares, having helped Bezos start the technology giant in 1994.

The author has since posted about her charitable donations, such as in December, when she revealed she had donated more than $4bn in just four months to women-led charities, food banks and Black colleges.

Despite the size of these donations, she is still the world's 22nd-richest person, worth $59.5bn, according to Forbes.