Thailand says China must make a formal extradition request if it wants two Uyghur men returned, in response to growing concerns about their fate if they are sent back. The two men, in letters shared last week, are pleading not to be sent back to China after being held in Thailand for over a decade. Human rights activists say the men may meet with abuse or torture if returned. The activists and some Thai politicians have raised concerns about their deportation. The men, detained in 2014, are currently held at an immigration center in Bangkok. Human rights groups fear their deportation is imminent. Thailand deported 40 Uyghurs to China last year.