Divisive internet personality Andrew Tate, his brother and two other suspects will remain in custody until February 27, a Romanian court says, extending their detention.
Tate and his co-accused were detained by Romanian anti-organised crime prosecutors on December 29 on charges of forming a criminal gang to sexually exploit six women.
A court ruled on January 10 that the suspects should remain in Romanian police custody for a full 30 days.
Tate's lawyer could not immediately be reached for comment.
Tate and his fellow suspects have previously denied any wrongdoing.
Romanian authorities have said that they have seized goods and money worth 18 million lei ($A5.72 million) as part of the investigation.
Tate, an ex-contestant on the United Kingdom reality show Big Brother, gained notoriety for misogynistic remarks and hate speech.
His remarks got him banned from all major social media platforms, although his Twitter account became active again in November after Elon Musk acquired the platform.
He has 4.7 million followers on Twitter
Tate, who holds US and UK citizenship, has said that women are partially responsible for being raped and that they belong to men.