Australian Activist Vanishes in Cambodia, Wife Fears 'Abduction' by Vietnam

Fears are growing for Tran Hiep, an Australian democracy campaigner, who has been missing in Cambodia since September 18. A human rights group has accused Vietnamese authorities of abducting him and another activist in an act of "transnational repression."

Hiep, 50, was scheduled to meet his wife, Chloe Dang, in Bangkok after traveling to Phnom Penh to connect with human rights defenders. However, he never boarded his flight and has not been heard from since.

He is the founder of the Australian Alliance to Combat Human Trafficking and was traveling with Vietnamese-Norwegian activist Nguyen Duc Thuan. The pair were reportedly meeting with dissident Vietnamese activists for training in Cambodia.

Viet Tan, a pro-democracy diaspora political party and a group with which both Hiep and Thuan are affiliated, claims Vietnamese authorities fabricated charges to "cover up an act of transnational repression." The group stated that the pair had no intention of entering Vietnam.

"This is a blatant fabrication intended to conceal the fact that the Viet Tan members were abducted in Cambodia and forcibly taken to Vietnam," Viet Tan said in a statement released Monday night.

Viet Tan is urging the Norwegian and Australian governments, along with human rights organizations, to pressure Vietnam for the immediate and unconditional release of Hiep and Thuan. The group also expressed concern for Thuan's health, noting he is diabetic and requires daily insulin injections.

Dang, Hiep's wife, voiced her deep concern for her husband's safety. "My family and I are really worried about his safety, and we just only want to know where he is and what happened to him," she told Australian Associated Press (AAP) from Bangkok airport. "My husband deserves protection, and I really hope the Australian government will continue to put pressure on Cambodia to do an investigation to find out where he is right now."

Vietnam has intensified its crackdown on dissidents in recent years, with over 55 activists arrested under broad criminal laws in 2025, according to reports. Civil society groups and United Nations human rights experts have frequently warned about increasing cooperation between Vietnamese authorities and neighboring governments targeting activists.

"Their disappearance is not an ordinary 'missing person' incident. Both men are long-time human rights advocates and Viet Tan members," Viet Tan stated.

Dang, 36, described the psychological toll of the uncertainty. "It's been 11 days and I'm really in the dark," she said, visibly distressed. "I don't know where he is and how he's doing - it's driving me crazy. Everything is really uncertain."

The Australian government confirmed that consular officials are in contact with Dang. "The Department of Foreign Affairs and Trade is providing consular assistance to the family of an Australian reported missing in Cambodia," a department spokesperson told AAP on Monday.

The families of both missing men have filed an appeal with the UN Working Group on Enforced or Involuntary Disappearances.