Two members of the Viet Tan organization, Trần Hiệp (Australian citizen) and Nguyễn Đức Thuận (Norwegian citizen), are being held at the B34 detention center in Ho Chi Minh City. Their detention is part of an investigation by the Vietnamese Ministry of Public Security. The two men, along with a Vietnamese national, Thái Công Trường Sơn, were arrested for allegedly using forged documents to enter Vietnam illegally from Cambodia.

The Viet Tan organization has confirmed that both Hiệp and Thuận are members, while they are verifying information regarding Sơn. Chloe Đặng, the wife of Trần Hiệp, stated that the Australian consulate informed the family on October 8 about Hiệp's condition in detention, indicating he is in good health and being held in accordance with local laws. However, she expressed concern as the consulate has yet to arrange a meeting with him.

The family has sent money and personal items to Hiệp but remains anxious due to the lack of direct contact. They are also in the process of hiring a lawyer for him. Meanwhile, the family of Nguyễn Đức Thuận has engaged two lawyers from Elden Advokatfirma in Norway to assist with the case. They are considering filing a complaint regarding the alleged forced disappearance, suspecting involvement from Cambodian authorities.

On September 29, Australian Prime Minister Anthony Albanese confirmed that the government is providing consular support to Hiệp's family, while Norway's Ministry of Foreign Affairs is also monitoring the situation and advocating for access to Thuận.

Châu Văn Khảm, a former detainee at B34 and a member of Viet Tan, shared his experiences from his time there, describing harsh living conditions and inadequate nutrition. He emphasized that the detention center lacks a clear policy on investigation procedures, with visits from consular officials being sporadic.

The Cambodian Ministry of Interior denied allegations that they had detained and handed over Hiệp and Thuận to Vietnam, stating that they are investigating the circumstances surrounding their disappearance.

The situation gained public attention on September 25 when Viet Tan announced that Hiệp and Thuận had gone missing in Cambodia. On September 28, the Vietnamese Ministry of Public Security announced their arrest for illegal entry into Vietnam, with charges including terrorism and forgery of official documents.

Both Viet Tan and the families of Hiệp and Thuận have rejected the accusations against them. On October 7, a letter signed by 29 international organizations condemned the Vietnamese government's actions, calling for the immediate release of the detainees and for consular access to be granted.