Often dubbed a Vietnamese version of “Pussy Riot” or Lady Gaga because of her activism and provocative style, Mai Khoi was among dozens of dissidents on the watch list of Communist-ruled Vietnam for her strong words against the system.

“When Mai Khoi landed at Noi Bai airport, at 9:15am this morning, she texted me to say: ‘Love, I just landed’,” Mai Khoi’s Australian husband, Benjamin Swanton, posted on her Facebook page, which has some 46,000 followers.

“At 9:39am, she texted another message: ‘Detained’.” Swanton wrote.

Swanton said he had not been able to contact Mai Khoi since. Calls to authorities at Noi Bai International airport and Mai Khoi’s mobile phone went unanswered.

“We have been evicted from our house three times now,” Swanton said.

At least 129 people are currently detained in Vietnam for criticising or protesting against the government, according to a February report by Human Rights Watch.

A crackdown on dissent last year caused scores of activists to flee the country, according to Amnesty International.

Mai Khoi, who last year protested beside US President Donald Trump’s motorcade during his visit to Vietnam by holding up a poster which said “Piss on you Trump”, had not yet been subjected to a travel ban by the Vietnamese authorities.

She met former US president Barack Obama during his visit in Vietnam in 2015.

The title of her new album “Bat Dong”, which she had been in Europe to promote, translates to “Disagreement”.

Her song “Please, sir” pleads with the leader of the Communist Party to allow ordinary Vietnamese people to sing, publish, share and travel freely.

“Right now I’m very worried about my wife and how she’s being detained and until when,” Swanton said in the Facebook post.