The United Nations says at least 1 million ethnic Uighurs and other Muslims have been detained in what China describes as "vocational training centers" to stamp out extremism and give people new skills.

Authorities sent the opposition leaders back to New Delhi after they waited for several hours at the airport in Srinagar, the main city in the region. Journalists were also stopped from entering.

Researchers using surveillance technology that can peer down on vessels from space have for the first time shed light on the extent and locations of transshipments, an innovation going back to the 1960s that has also been linked to illegal fishing, drug smuggling and human rights abuses.