Four Tibetan monks from Drilda monastery in Trido Township, in Tibet’s Sog County, were arrested by Chinese authorities on the night of March 17, says Ngawang Tharpa, a Tibetan with contacts in the region The four monks are Tsangyang Gyatso, Tsewang, Atse and Gyalsten. The reasons for their arrest are not known due to the strict restrictions currently imposed by authorities in the region. Tsangyang Gyatso is the chant leader at Drilda monastery.