Part of the website of the upcoming US president Joe Biden appears to have been hacked.
Someone posted Turkish texts on the site on Thursday.
The hacker calls himself a Turkish Muslim on the page.
He is warning the United States of a "nightmare" if they "don't take [their] hands off my country."
In addition, the hacker posted a Turkish flag, a photo, and a music video that YouTube has since hidden behind an age warning.
The affected website is a subdomain that Biden used during his election campaign.
The site contained information on voting in the United States.
The username that the hacker posts on his site is also used for a Twitter account that claims to have hacked several Instagram accounts. This does not necessarily mean that what is claimed on the site is also true.