A well-known Chinese rights lawyer has appeared on state television confessing to crimes after a months-long disappearance, the latest case in China's widening crackdown on dissent.
Zhang Kai had represented a group of Christians who were detained for suspected financial crimes last year after they resisted the demolition of crosses.
Heavily Christian Wenzhou, in the eastern province of Zhejiang, was the site of protests in 2014 over a government campaign to demolish crosses.
On a news program on state-controlled Wenzhou TV on Thursday night, Zhang confessed to encouraging Christians to come together to "protect their rights" after the authorities removed crosses from churches.
"I really regret doing these things, I feel very remorseful," Zhang said. "These things violated China's law and violated my personal integrity as a lawyer, and they harmed societal structure and national security."
Police in Wenzhou could not be reached for comment, and Zhang's exact location was not clear.
In Washington, State Department spokesman Mark Toner said: "Such confessions are counter to the standards of a rule-of-law society. ... We urge China to release Zhang and others detained for seeking to peacefully uphold the freedom of religion guaranteed in China's constitution."
He said he did not know if U.S. Secretary of State John Kerry raised Zhang's case in talks with Chinese Foreign Minister Wang Yi in Washington this week.
In October, Kerry said Zhang, who had represented Christian groups, was detained shortly before a planned meeting in August with David Saperstein, the U.S. ambassador for international religious freedom, who was visiting China.
Suspects accused of crimes in high-profile cases are often shown confessing on Chinese state television. Rights groups have said these confessions, which usually take place long before a trial, violate the rights of the accused to due process.
Authorities in the region have said crosses are removed because they violate regulations against illegal structures. Rights groups say demolishing crosses restricts Christianity and religious freedoms.
Communist China officially guarantees freedom of religion though authorities are sometimes suspicious of religious groups.
Experts say there are up to 60 million Protestants in China, divided between official and unregistered churches.
A top Chinese pastor came under investigation last month on suspicion of embezzling funds after he publicly opposed a cross removal campaign.