Dhamchoe ; 14 ; was detained along with his brother ; Sonam Yonten ; 10 ; and 18 other Tibetans following a protest in Sershul county ; Kardze TAP ; Sichuan province on August 28 ; 2009. Based on information provided by a Tibetan monk living in exile ; the Voice of Tibet radio service reported that on the eve of the opening of a new hall at Tashi Gephelling monastery in Zakay township ; Sershul county ; Kardze TAP ; a group of Tibetans removed a Chinese national flag ; wrote pro- Tibetan slogans on it after tearing it into pieces ; and replaced it with the Tibetan national flag. The same source told Voice of Tibet that on the next day ; August 28 ; 2009 ; approximatley 1000 Tibetans gathered for the opening of the prayer hall ; at which point some of those who gathered started singing songs in praise of the Dalai Lama.