A Uyghur student has been missing in Hong Kong for more than two weeks since he sent a message saying he was being interrogated by Chinese police at the city's airport, a human rights group said on Friday. Amnesty International said Abuduwaili Abudureheman, who was born in Xinjiang in western China, travelled to Hong Kong from South Korea to visit a friend on May 10 but has not been heard from since he texted his friend about being interrogated after his arrival.