A 22 year old person was killed and another sustained serious injury after a roof of a crumbled building falls upon them while trying to clean the area at Leimakhong area around 9 am today. The house was destroyed in the January 4 tremor. The deceased has been identified as Mangboi Touthang (23) son of Tongkhonglen Touthang of Leimakhong and the injured one is identified as Jangningthang touthang (22) son of Hengjang Tongthang of Bilei village of Saikul. The injured person was admitted to Raj Medicity.