The man, Lhaten, received a telephone call at around 15:00 from a female Chinese teacher at Taktse County Primary School, asking him to fetch his son who was studying there.
When Lhaten reached the school, several policemen dressed as civilians were waiting for him. Answering queries from Lhaten's relatives, the school gatekeeper later reportedly said the police took Lhaten away in a black car.
Lhaten was suspected of having connections with Dhondup Wangchen, a Tibetan film-maker who is serving a six-year prison sentence, having been charged with 'subversion' for making the documentary Leaving Fear Behind, ahead of the 2008 Beijing Olympics.
Lhaten, a farmer and sole family breadwinner, lived with his wife Passang Choedon and their three children.
Currently, there is no information about his health or whereabouts.