Phnom Penh (AFP) - Prosecutors demanded life imprisonment Monday for two former leaders of Cambodia's Khmer Rouge accused of crimes against humanity, delighting survivors hoping for long-awaited justice for the "Killing Fields" atrocities.

"Brother Number Two" Nuon Chea, 87, and ex-head of state Khieu Samphan, 82, are accused of playing a leading role in the communist regime's reign of terror in the late 1970s that left up to two million people dead.