They had briefed officials on Vietnam’s human rights situation ahead of an annual dialogue.
But US silence on human rights has experts looking to other countries to raise the region’s grave problems.
Officials say another Vietnamese died while in captivity.
Brotherhood for Democracy members Le Anh Hung Truong Van Dung decline to turn up, saying they have done nothing wrong.
Activists say Hanoi's arbitrary detention of bloggers and rights defenders violates the spirit of APEC.
Hoang Duc Binh could face 2-7 years in prison following arrest for leading environmental protests.
Forty academics urge the Communist Party to free "Mother Mushroom" and another woman jailed for posting anti-state propaganda.
Many suspect the menacing groups are sanctioned by the government to harass critics and rights defenders.
She asks her to intervene with Vietnam's government to win her mother's release from a prison term served for politically sensitive writings.
He had posted writings criticizing official corruption on his two blogs.
Authorities prosecute, detain, and harass activists to silence dissenting voices, the groups say in an open letter.
The call to residents to surrender to police breaks authorities' earlier pledge not to pursue charges against them.
Student activist faces charges of 'propaganda against the state' under Article 88 for his writing criticizing corruption.
Civil Rights Defenders also calls for an end to the persecution of activists under Article 88.
Tran Thi Thuy, sentenced to an eight-year term for petitioning for land rights, is in constant pain from tumors, her brother says.
Pham Doan Trang, author of 'Politics For All,' explains the motivation for writing her new book in an interview with RFA’s Vietnamese Service.
Vuong Van Tha was taken into custody in May, after police laid siege to his home.
His father says authorities never provided a clear reason for the detention.
Hundreds of uniformed officers destroy tents and attack protesters with shock batons and water cannon, sources say.
Foreign ministers of both countries have discussed incident at sea, officials say.
They want Hong Kong-owned Pacific Crystal to permanently shut down the facility and move out of Lai Vu commune in Hai Duong province.
Nguyen Van Oai is sentenced for resisting police officers and leaving his home while on probation.
Group members included pro-government activists and appeared to have official support, priest says.
Nguyen Van Tuc is the sixth member of the Brotherhood For Democracy to be taken into custody in recent weeks.
The pair, who had been jailed before, were convicted most recently under Article 79, a broadly worded national security law.
Vo An Don says he expects to be made an example of for posting allegations of bribery on Facebook.
The April 2016 Formosa toxic spill galvanized activists, many of whom have been jailed.
Sailor was freed from Abu Sayyaf after nine months in captivity.
Truyen's wife likens his arrest to a kidnapping and says she worries about his safety.
Vietnamese bishop from disaster-stricken coastal area visits Taiwan to compare notes with lawyers who have dealt with pollution cases involving Formosa.