Updated

A senior police officer in Pakistan says two prisoners believed to be involved in the 2013 slaying of 10 foreign climbers at the base of one of the world's tallest mountains have escaped from jail.

Senior police officer Ishaq Hussain says four Pakistanis held at a jail in the northern city of Gilgit tried to escape before dawn Friday.

He says the guards chased the men, killing one of them and re-arresting another. But two of their associates escaped.

Hussain says security forces are searching for the prisoners.

He said authorities arrested the four men about six months ago. They have not yet faced trial. The deaths of the climbers and one of their Pakistani guides at the base of Nanga Parbat shocked the country and the climbing community.