Rifle-toting Cambodian police arrested ex-Khmer Rouge President Khieu Samphan on Monday, the latest member of Pol Pot’s inner circle to be detained by the U.N.-backed ”Killing Fields” tribunal. The French-educated guerrilla leader was taken from a hospital in the capital Phnom Penh where he was treated after suffering a fall last week at his home in the former Khmer Rouge stronghold of Pailin on the Thai border.

”My client is being transferred to the tribunal today where he will appear before the co-investigating judges,” Say Bory, Khieu Samphan’s lawyer, told Reuters.