Amnesty International says China `` must cease harassing '' survivors . Relatives detained for seeking answers about children 's deaths , report says . Official death toll from May 12 quake is 69,227 ; 17,923 are missing . Comment:
Amnesty International says China `` must cease harassing '' survivors . Relatives detained for seeking answers about children 's deaths , report says . Official death toll from May 12 quake is 69,227 ; 17,923 are missing . Government blamed for buildings ' collapse .