A Saudi woman being held at Bangkok airport on Monday appealed for asylum and for other passengers to help protest her looming deportation, in desperate tweets from the hotel room where she barricaded herself.

Video from @rahaf84427714 just sent from her hotel room at the #Bangkok airport. She has barricaded herself in the room & says she will not leave until she is able to see #UNHCR. Why is #Thailand not letting @Refugees see her for refugee status determination? @hrw #SaveRahaf pic.twitter.com/3lb2NDRsVG

— Phil Robertson (@Reaproy) January 7, 2019

The incident comes against the backdrop of intense scrutiny of Saudi Arabia over its investigation and handling of the shocking murder of journalist Jamal Khashoggi last year, which has renewed criticism of the kingdom's rights record.

Rahaf Mohammed al-Qunun told AFP she ran away from her family while travelling in Kuwait because they subjected her to physical and psychological abuse.

She said she had planned to travel to Australia and seek asylum there, and feared she would be killed if she was repatriated by Thai immigration officials who stopped her during transit on Sunday.

The 18-year-old said she was stopped by Saudi and Kuwaiti officials when she arrived at Suvarnabhumi airport and her travel document was forcibly taken from her, a claim backed by Human Rights Watch.

She tweeted that she was due to be deported on a Kuwait Airways flight to Kuwait due to depart at 11.15am (0415 GMT).

"I ask the government of Thailand... to stop my deportation to Kuwait," she said on Twitter. "I ask the police in Thailand to start my asylum process."

Shortly before the scheduled departure, Qunun posted a plea for people within "the transit area in Bangkok to protest against deporting me".

"Please I need u all," she wrote. "I'm shouting out for help of humanity."

In a sign of growing desperation during the night, Qunun posted video of her barricading her hotel room door with furniture.

If sent back, she said she will likely be imprisoned, and is "sure 100 percent" her family will kill her, she told AFP.

A senior Thai immigration official said Sunday that Qunun was denied entry because she lacked "further documents such as return ticket or money" and Thailand had contacted the "Saudi Arabia embassy to coordinate".

Phil Robertson of Human Rights Watch said Qunun "faces grave harm if she is forced back to Saudi Arabia" and Thailand should allow her to see the United Nations High Commissioner for Refugees (UNHCR) and apply for asylum.

"Given Saudi Arabia's long track record of looking the other way in so-called honour violence incidents, her worry that she could be killed if returned cannot be ignored," he said.

The UNHCR said that according to the principle of non-refoulement, asylum seekers cannot be returned to their country of origin if their life is under threat.

"The UN Refugee Agency has been following developments closely and has been trying to seek access from the Thai authorities to meet with Rahaf Mohammed Alqunun, to assess her need for international protection," it said in a statement.

The ultra-conservative kingdom has long been criticised for imposing some of the world's toughest restrictions on women.

That includes a guardianship system that allows men to exercise arbitrary authority to make decisions on behalf of their female relatives.

In addition to facing punishment for "moral" crimes, women can also become the target of "honour killings" at the hands of their families, activists say.

Abdulilah al-Shouaibi, charge d'affaires at the Saudi embassy in Bangkok, acknowledged in an interview with Saudi-owned channel Rotana Khalijial that the woman's father had contacted the diplomatic mission for "help" to bring her back.

But he denied that her passport had been seized and that embassy officials were present inside the airport.

Saudi Arabia has come under fierce criticism following the murder of dissident journalist Khashoggi inside the kingdom's Istanbul consulate on October 2 -- a case that stunned the world.

Another Saudi woman, Dina Ali Lasloom, was stopped in transit in the Philippines in April 2017 when she attempted to flee her family.