URGENT ACTION: Attempted extrajudicial killing in Mexico City of Matias Flores, indigenous Nahuatl of Human Rights Committee of the Huasteca and Eastern Sierra (CODHHSO en espanol); Jesus Hernandez Reyes and Rubicel Hernandez Garcia, indigenous Nahuatl, members of the National Socialist Front (FNLS en espanol) for denouncing the extrajudicial killing in Chiapas of Hector Santiz Lopez. - comments