Romanian authorities have launched an investigation into British-American influencer Tristan Tate over allegations he broke election laws by posting political content on social media during the country's recent presidential elections.

The probe, confirmed by police sources, is centred on a social media post that Tate is alleged to have shared on election day and included direct or implicit political messaging, which is illegal in Romania.

Tate, 36, is the younger brother of controversial influencer Andrew Tate, 38, a self-described misogynist. The pair have a combined social media following of over 13 million.

Both are being investigated by Romanian authorities in a separate case in relation to a number of charges, which they deny.

The latest investigation was opened by Ilfov county police after it received an official complaint.