On 13 August ; an unknown number of Tibetans were detained as Chinese security forces violently disrupted a demonstration in Ngaba. Two of the detainees have been identified as Bhongo Kyi ; 44 ; and Chechok ; 48. Both men were amongst many seriously injured as security personnel beat protestors indiscriminately. The demonstration followed the joint self-immolation protest of Lungtok and Tashi earlier the same day.