The UN-back tribunal on Khmer Rouge genocidal crime on August 7 sentenced two former Khmer Rouge leaders to life imprisonment for the charge of crimes against humanity.

Noun Chea, 88, and Khieu Samphan, 83, were among senior officials of the Khmer Rouge regime which was accused of killing 1.7 million Cambodians during their ruling from 1975 to 1979.

The trial chamber found Nuon Chea and Khieu Samphan guilty of crimes against humanity, including extermination, murders, political persecution, and other inhumane acts comprising forced evacuations and attacks against human dignity, said the verdict.

The verdict came after a two-year trial of the two former leaders began in November 2011 and ended in October 2013.

The tribunal - the Extraordinary Chambers in the Courts of Cambodia (ECCC) - was set up in 2006 with the aim of seeking justice for victims of the Khmer Rouge genocidal regime.

Earlier, the tribunal's supreme court sentenced ex-chief of Tuol Sleng prison Kaing Guek Eav, or Duch, to life in jail for overseeing the deaths of around.-VNA