The sister of detained Saudi activist Jane Hathall has appealed to famous American singer Mariah Carey not to forget her sister and role in the human rights movement during her planned concert in the kingdom.

A few days ago, King Abdullah Economic City announced Carrie's debut in the country on January 31 as part of the Saudi International Golf Championship.

Through her Twitter account, Alia al-Hathul's sister Alia said she hoped her sister would be present at the ceremony, but she was behind the bars because she tried to improve the situation of women in Saudi Arabia.

Belgian resident Alia urged singer Carrie to thank Jane for the concert because of what she saw efforts for her sister, which resulted in an opening to singing and music.

Earlier, Alia al-Hathul asked a question by US Secretary of State Mike Pompeo ahead of a tour of the region, in which Saudi Arabia asked whether to bring up the case of her sister in custody in Saudi Arabia.

"My sister is a prisoner in Saudi Arabia. Will Mike Pompeo remain silent?" Alia wrote in the New York Times. In which she said that the foreign minister is visiting Saudi Arabia today, and is expected to discuss the files of Iran, Yemen and Syria and the latest findings of investigations into the killing of Saudi journalist Jamal Khashoggi.

"But I was struck by the fact that the fate of Saudi women brave women who were imprisoned in the kingdom because of their attachment to their rights and dignity was not included in the agenda of Pompeo's visit," she said.

Alia, who lives in Brussels, said in detail that her sister was subjected to torture, solitary confinement, beating, stabbing, harassment and threats of rape and murder, adding that some torture sessions involved torture and threats.