MEXICO CITY (Reuters) - Eight Mexicans were killed in an apparently mistaken attack by Egyptian security forces that killed 12 people and wounded 10, the sister of a Mexican Reiki healer who was among the dead said on Monday, citing a relative of their slain guide.

Mexico's foreign ministry said on Monday at least two Mexicans were killed, though Egyptian security and judicial sources later said that eight Mexicans and four Egyptians were killed, and that eight Mexicans and two Egyptians were wounded.